๐ข Full company list (392+) โ click to expand
Abnormal Security, Abridge, Accenture, Addepar, Adobe, Adyen, Affirm, Agoda, Airbnb, Airbyte, Airtable, Airwallex, Akuna, Akuna Capital, Alarm.com, Alchemy, Alpaca, Amazon, Ambience Healthcare, AMD, American Express, Amperity, Anchorage, Anduril, Anthropic, Apple, Applied Intuition, Arista Networks, Asana, Assort Health, Astrotalk, AT&T, Atlassian, Attentive, Aurora Innovation, Autodesk, Axon, Barclays, Baseten, Bilt Rewards, BitGo, Blackrock, Blinkit, Bloomberg, Bloomberg LP, BNP, BNY Mellon, Bobyard, Booking.com, Boston Consulting Group, Box, Braze, Brex, ByteDance, Canva, Capgemini, Capillary Technologies, Capital One, Careem, Carta, Cerebras, Chainalysis, Character.AI, Charta Health, Chicago Trading, Chicago Trading Company, Circle, Cisco, Citadel, Clay, ClearTax, Clickhouse, Clio, Clipboard Health, Cloudflare, Coalition, Codeium, Cognitiv, Cohere, Coinbase, Commure, Commvault, Concentric AI, Confluent, Coupa Software, Cresta, CrowdStrike, Crusoe, Cursor, Cvent, Databricks, Datadog, DatologyAI, David AI, DE Shaw, Decagon, Deloitte, Deutsche Bank, DigitalOcean, Discord, Distyl AI, DocuSign, DoorDash, Dropbox, DRW, DTCC, Ease, Eat Club, eBay, Edge, Eightfold, Elastic, ElevenLabs, Epam, Epic, Epify, Ericsson, Etched, EvenUp, Expedia, FactSet, Figma, Fireworks AI, Fivetran, Flexport, FlexTrade, Flipkart, FluidStack, Fortinet, Fox Corporation, Freshworks, Gatik AI, GE Vernova, Gecko Robotics, Geico, General Motors, Geneva Trading, GEP, Get My Parking, Giga, GitHub, Globalization Partners, Gojek, Goldman Sachs, GoodScore, Google, Grab, Grammarly, Groww, Grubhub, Guidewire, Gusto, HackerRank, Hadrian, Harness, Harvey, Headlands, Headway, Hebbia, Highspot, HSBC, Hudson River Trading, Hyper Verge, IBM, IDFC, Illumio, IMC, IMC Trading, Indeed, Infosys, Instacart, Intuit, Ironclad, IXL Learning, Jane Street, JioStar, JP Morgan, JP Morgan Chase, JPMorgan Chase, Juspay, Kalshi, Kaseya, Kickdrum, Kotak Mahindra Bank, Lambda, LangChain, Latent, Lenskart, LinkedIn, LiveKit, Luma AI, Lyft, MakeMyTrip.com, MathWorks, Matroid, Maven Securities, McKinsey, Medallion, Meesho, Mercor, Mercury, Mercury Insurance, Meta, Micro1, Microsoft, Millennium, Mintlify, Mistral AI, Modal, Modular, MongoDB, Morgan Stanley, Motive, Moveworks, NatWest, Netflix, New Relic, Nextdoor, Nike, Inc., Ninja Van, Nubank, Nuro, Nutanix, Nvidia, Nykaa, Observer.AI, Odoo, Okta, Old Mission, Omnissa, Onehouse, OnePay, OneTrust, Onix, OpenAI, Opendoor, Optiver, Oracle, Oscar Health, Otter.ai, Oura, Palantir, Patreon, Paypal, PayPay, Paytm, Perplexity AI, Persona, PhonePe, Physical Intelligence, Pinterest, Plaid, Point72, PostHog, Postman, Profound, Publicis Sapients, Pure Storage, QRT, Qualified Health AI, Quince, Quora, Ramp, Razorpay, Reddit, RedNote, Reducto, Remitly, Render, Replit, Retell AI, Retool, Revolut, Rippling, Rivian, Robinhood, Roblox, Rogo, Roku, Rubrik, Runloop, Runway, Rupeek, Rurik, Safe Security, Salesforce, SambaNova Systems, Samsara, Samsung, Sarvam AI, SavantLabs, Scale AI, Scribd, SeekOut, SentinelOne, Sentry, ServiceNow, Sesame, Shield AI, Shopify, Siemens, Sierra, Sig, Skydio, Skyscanner, Slack, Snap Inc., Snorkel AI, Snowflake, Sofi, SpaceX, Splunk, Spotify, Spotnana, Sprinter Health, SquadStack.ai, Square, Squarepoint, Squarepoint Capital, Stable Money, StackAdapt, Strala, Strava, Stripe, Sumo Logic, Suno, Supabase, Superhuman, Susquehanna International Group, Susquehanna International Group (SIG), Swiggy, Syfe, Target, TCS, Tekion, Temporal, Temu, Tesla, The D. E. Shaw Group, The D.E. Shaw Group, The Trade Desk, The Voleon Group, The Walt Disney Company, ThoughtSpot, TikTok, Toast, Together AI, Toptal, Toshiba, Trade Desk, Trend Micro, Twilio, Twitch, Two Sigma, Uber, Uber Freight, UiPath, Upstart, Valon, Vanta, Vercel, Verkada, Visa, Waabi, Walleye Capital, Walmart, Wayfair, Waymo, Wayve, Wells Fargo, WeRide, Wex, Whatnot, Wolverine Trading, Workday, World Wide Technology, Xperi, YahoO, Yelp, Ziina, Zip, Zipline, ZipRecruiter, Zolando, ZoloStays, Zomato / Eternal, Zoom, Zoox, Zopsmart, Zorvyn, ZS, Zscaler.
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Formats: Coding (3,039) ยท SQL (52) ยท System design (483) ยท Low-level design (123) ยท AI coding (58)
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| Company | OA / Interview Question | Format | Practice | Updated |
|---|---|---|---|---|
| Capital One | Summarize Taxi Drivers and Rides | SQL | ๐ฅ Oct 01, 2026 | |
| Capital One | Build Taxi Driver Performance Features | SQL | ๐ฅ Oct 01, 2026 | |
| Capital One | Prepare Taxi Driver Classification Data | SQL | ๐ฅ Oct 01, 2026 | |
| Capital One | Predict Taxi Driver Classes | SQL | ๐ฅ Oct 01, 2026 | |
| TikTok | Leftmost Memory Block Allocator (for mle also :) | Coding | ๐ฅ Sep 30, 2026 | |
| Rippling | Token Validation | Coding | ๐ฅ Sep 30, 2026 | |
| Rippling | REST API: Highest International Students | Coding | ๐ฅ Sep 30, 2026 | |
| Rippling | Server Investment | Coding | ๐ฅ Sep 30, 2026 | |
| TikTok | Cyclic Shift to a Reverse-Sorted Array | Coding | ๐ฅ Sep 30, 2026 | |
| TikTok | Count Coordinates Illuminated by Exactly One Lamp | Coding | ๐ฅ Sep 30, 2026 | |
| Capital One | Analyze House and Viewing Metrics | SQL | ๐ฅ Sep 30, 2026 | |
| Capital One | Build House Viewing Features | SQL | ๐ฅ Sep 30, 2026 | |
| Capital One | Prepare House Price Regression Data | SQL | ๐ฅ Sep 30, 2026 | |
| Capital One | Predict House Prices | SQL | ๐ฅ Sep 30, 2026 | |
| TikTok | Sort Matrix Borders | Coding | ๐ฅ Sep 30, 2026 | |
| TikTok | Count Even-Digit Numbers | Coding | ๐ฅ Sep 30, 2026 | |
| TikTok | Rectangle Fit Queries | Coding | ๐ฅ Sep 30, 2026 | |
| TikTok | Construct WDL String | Coding | ๐ฅ Sep 30, 2026 | |
| Design a Manufacturing Operations Agent | System design | ๐ฅ Sep 30, 2026 | ||
| Oracle / Retell AI / Apple / Google / Walmart / Flipkart / Globalization Partners / Amazon / Reddit / Atlassian | Design a Distributed Rate Limiter | System design | ๐ฅ Sep 29, 2026 | |
| Moveworks / Atlassian | Design Cloud Usage Billing Infrastructure | System design | ๐ฅ Sep 29, 2026 | |
| Amazon / Instacart / Zip / Nykaa | Design a Last-Unit Inventory Reservation Service | System design | ๐ฅ Sep 29, 2026 | |
| Autodesk / Nykaa | Design a Rapid Grocery Ordering Platform | System design | ๐ฅ Sep 29, 2026 | |
| Nykaa | Design a Shared Expense Splitting Service | Low-level design | ๐ฅ Sep 29, 2026 | |
| OpenAI | Leaves Remaining After Wind Gusts | Coding | ๐ฅ Sep 29, 2026 | |
| OpenAI | Count Routes Through Four Shop Types | Coding | ๐ฅ Sep 29, 2026 | |
| OpenAI | Invert or Blur an Image | Coding | ๐ฅ Sep 29, 2026 | |
| OpenAI | Optimal First-Player Card Score | Coding | ๐ฅ Sep 29, 2026 | |
| Waymo | Design Fleet Map Data Collection | System design | ๐ฅ Sep 29, 2026 | |
| OpenAI / The D.E. Shaw Group / Zoox / Salesforce / Kotak Mahindra Bank / Mercor | Design an Online Payment Processing System | System design | ๐ฅ Sep 29, 2026 | |
| Postman / Anduril / DigitalOcean / Oracle / Adobe / Uber Freight / Grab / Goldman Sachs / Salesforce / Vercel / Sentry / Motive / Deloitte / ZipRecruiter | Design a URL Shortening Service | System design | ๐ฅ Sep 29, 2026 | |
| DoorDash | Food Review System | System design | ๐ฅ Sep 29, 2026 | |
| Amazon / Lyft / Google / Pinterest / Snowflake | Design a Web Crawler | System design | ๐ฅ Sep 29, 2026 | |
| Netflix / FluidStack / DigitalOcean / Nuro / Together AI | Design a Machine-Learning Job Scheduler | System design | ๐ฅ Sep 29, 2026 | |
| Capital One | Design a Credit Card Account and Authorization Platform | System design | ๐ฅ Sep 29, 2026 | |
| Pinterest / DoorDash / Patreon | Design an Ad Event Measurement Platform | System design | ๐ฅ Sep 29, 2026 | |
| Amperity | Design a Read-Once Secret Sharing Service | System design | ๐ฅ Sep 29, 2026 | |
| The D.E. Shaw Group / Uber | Design and Implement a Parking Lot | Low-level design | ๐ฅ Sep 29, 2026 | |
| Uber Freight | Design an In-Memory File System | Low-level design | ๐ฅ Sep 29, 2026 | |
| Mercor | Design a Dataset Copy API | System design | ๐ฅ Sep 29, 2026 | |
| Microsoft | Design a Lab Machine Fleet Monitor | System design | ๐ฅ Sep 29, 2026 | |
| Amperity | Design an Online SQL Service Over a Data Lake | System design | ๐ฅ Sep 29, 2026 | |
| OpenAI / Sprinter Health | Digital Game Distribution Platform | System design | ๐ฅ Sep 29, 2026 | |
| DoorDash | Dasher Pay with Store Waits and Peak Hours | Coding | ๐ฅ Sep 29, 2026 | |
| Stripe | Parse Boolean Rule Expressions | Coding | ๐ฅ Sep 29, 2026 | |
| Lyft | Stateful Paginated Fetch N | Coding | ๐ฅ Sep 29, 2026 | |
| Earliest Full Connectivity with Edge Removals | Coding | ๐ฅ Sep 29, 2026 | ||
| DoorDash | Customer Bootstrap API | Coding | ๐ฅ Sep 29, 2026 | |
| Amazon | Largest Binary-String Subset Within Bit Budgets | Coding | ๐ฅ Sep 29, 2026 | |
| Capital One | Banking System with Top Activity | Coding | ๐ฅ Sep 29, 2026 | |
| Stripe | Subscription and Usage-Based Billing Calculator | Coding | ๐ฅ Sep 29, 2026 | |
| Stripe | Request Routing System | Coding | ๐ฅ Sep 29, 2026 | |
| Uber Freight | Maximize Compatible Car Riders | Coding | ๐ฅ Sep 29, 2026 | |
| Lyft | Nested Transaction Key-Value Store with Value Counts | Coding | ๐ฅ Sep 29, 2026 | |
| Affirm | High-Card Pot Game | Coding | ๐ฅ Sep 29, 2026 | |
| Amazon | Lowest Common Ancestor in an Inserted BST | Coding | ๐ฅ Sep 29, 2026 | |
| Amazon | Maximize K-Element AND with an Increment Budget | Coding | ๐ฅ Sep 29, 2026 | |
| DatologyAI | Multiline Text Editor with Cursor Movement | Coding | ๐ฅ Sep 29, 2026 | |
| DatologyAI | SimpleRDD Multiset Intersection | Coding | ๐ฅ Sep 29, 2026 | |
| DatologyAI | SimpleRDD Word Count | Coding | ๐ฅ Sep 29, 2026 | |
| Choose a Shortest Path That Avoids Bob | Coding | ๐ฅ Sep 29, 2026 | ||
| Count Matrix Paths Through Ordered Checkpoints | Coding | ๐ฅ Sep 29, 2026 | ||
| Count Enclosed Freshwater Regions | Coding | ๐ฅ Sep 29, 2026 | ||
| Maximum-Area Rectangle from Points | Coding | ๐ฅ Sep 29, 2026 | ||
| Safest Mouse Path Away from a Cat | Coding | ๐ฅ Sep 29, 2026 | ||
| Shortest Land Path | Coding | ๐ฅ Sep 29, 2026 | ||
| Unique Elements in Range Queries | Coding | ๐ฅ Sep 29, 2026 | ||
| Maximum Profit from Non-Overlapping Jobs | Coding | ๐ฅ Sep 29, 2026 | ||
| IBM | Variadic Function Library Matches | Coding | ๐ฅ Sep 29, 2026 | |
| Mercor | CSV Row Serializer | Coding | ๐ฅ Sep 29, 2026 | |
| Mercor | Merge Sort Report with a Noisy Comparator | Coding | ๐ฅ Sep 29, 2026 | |
| Microsoft | Foreground Region Sizes | Coding | ๐ฅ Sep 29, 2026 | |
| Netflix | Score-Rotating Movie Playlist | Coding | ๐ฅ Sep 29, 2026 | |
| Netflix | Repeated Titles in Viewing History | Coding | ๐ฅ Sep 29, 2026 | |
| Okta | Randomized Collection with Duplicate Values | Coding | ๐ฅ Sep 29, 2026 | |
| Okta | Top-Down Employee Reporting Forest | Coding | ๐ฅ Sep 29, 2026 | |
| Rippling | Best and Worst Camel Card Completions | Coding | ๐ฅ Sep 29, 2026 | |
| Snowflake | Length-Prefixed String Codec | Coding | ๐ฅ Sep 29, 2026 | |
| Stripe | Render a Task Tree from CSV Rows | Coding | ๐ฅ Sep 29, 2026 | |
| Stripe | Invoice / Payment Reconciliation | Coding | ๐ฅ Sep 29, 2026 | |
| Uber | Dynamic Island Counts | Coding | ๐ฅ Sep 29, 2026 | |
| Uber | K Smallest Squares from a Sorted Array | Coding | ๐ฅ Sep 29, 2026 | |
| Uber | Count Connected Islands | Coding | ๐ฅ Sep 29, 2026 | |
| Valon | Out-of-Order Loan Ledger | Coding | ๐ฅ Sep 29, 2026 | |
| Verkada | Host Log Parser | Coding | ๐ฅ Sep 29, 2026 | |
| Waymo | Island Area and Water Boundary | Coding | ๐ฅ Sep 29, 2026 | |
| Waymo | Linked Perception History | Coding | ๐ฅ Sep 29, 2026 | |
| WhatNot | Attraction Route Without Reusing Trails | Coding | ๐ฅ Sep 29, 2026 | |
| WhatNot | Earliest Car for Each Passenger | Coding | ๐ฅ Sep 29, 2026 | |
| WhatNot | Minimum Stores for a Shopping List | Coding | ๐ฅ Sep 29, 2026 | |
| Microsoft | Shopkeeper Final Price Summary | Coding | ๐ฅ Sep 28, 2026 | |
| Microsoft | Maximum Reward Points | Coding | ๐ฅ Sep 28, 2026 | |
| OpenAI | Network Endpoint or Cycle Boundary | Coding | ๐ฅ Sep 28, 2026 | |
| OpenAI | Largest Microorganism After Consumption | Coding | ๐ฅ Sep 28, 2026 | |
| OpenAI | Repair One Movement Instruction | Coding | ๐ฅ Sep 28, 2026 | |
| Attentive | Design Retailer Product Catalog Serving | System design | ๐ฅ Sep 28, 2026 | |
| DigitalOcean / Attentive | Ad Serving and Performance Statistics | System design | ๐ฅ Sep 28, 2026 | |
| Amazon / Tesla / Datadog / Oracle | Design a Video Storage and Streaming Platform | System design | ๐ฅ Sep 28, 2026 | |
| Amazon | Minimum Merge Conflicts | Coding | ๐ฅ Sep 28, 2026 | |
| Oracle | Next Permutation | Coding | ๐ฅ Sep 28, 2026 | |
| Abridge | Decode String | Coding | ๐ฅ Sep 28, 2026 | |
| Abridge | Flip, Invert, and Smooth a Binary Image | Coding | ๐ฅ Sep 28, 2026 | |
| Abridge | String Compression | Coding | ๐ฅ Sep 28, 2026 | |
| Abridge | Sum Multiples of 3, 5, or 7 | Coding | ๐ฅ Sep 28, 2026 | |
| Amazon | Evaluate Division | Coding | ๐ฅ Sep 28, 2026 | |
| Amazon | Apply a Reversi Move | Coding | ๐ฅ Sep 28, 2026 | |
| Amazon | Longest Content Window with Bounded Labels | Coding | ๐ฅ Sep 28, 2026 | |
| ByteDance | Spiral Matrix Traversal | Coding | ๐ฅ Sep 28, 2026 | |
| Coinbase | Select a Fee-Maximizing Dependency-Closed Block | Coding | ๐ฅ Sep 28, 2026 | |
| Confluent | Sequential Phrase Search Across Documents | Coding | ๐ฅ Sep 28, 2026 | |
| Confluent | Sudoku Board Validation | Coding | ๐ฅ Sep 28, 2026 | |
| Confluent | Sudoku Puzzle Solver | Coding | ๐ฅ Sep 28, 2026 | |
| Confluent | Word Search Across Documents | Coding | ๐ฅ Sep 28, 2026 | |
| IBM | Count Triplets Within a Value Range | Coding | ๐ฅ Sep 28, 2026 | |
| IBM | Count Active Employee Access Grants | Coding | ๐ฅ Sep 28, 2026 | |
| Uber | Grid Robot Route with Charging Priorities | Coding | ๐ฅ Sep 28, 2026 | |
| Wex | String Permutations in Custom Character Order | Coding | ๐ฅ Sep 28, 2026 | |
| Wex | Stack Command Output | Coding | ๐ฅ Sep 28, 2026 | |
| Capital One | Check Array Arithmetic Expressions | Coding | ๐ฅ Sep 28, 2026 | |
| Capital One | Match Songs with Repeatable Animations | Coding | ๐ฅ Sep 28, 2026 | |
| Capital One | Maximum Rhombic Area Sum | Coding | ๐ฅ Sep 28, 2026 | |
| Capital One | Count Subarrays with K Disjoint Equal Pairs | Coding | ๐ฅ Sep 28, 2026 | |
| Kotak Mahindra Bank | Design a Movie Ticket Booking Platform | Low-level design | ๐ฅ Sep 28, 2026 | |
| Confluent | Design a Podcast Subscription Feed API and Data Model | System design | ๐ฅ Sep 28, 2026 | |
| Netflix / Oracle / Google / Meta / ByteDance / Astrotalk / LinkedIn / Microsoft | Design a Personalized Recommendation System | System design | ๐ฅ Sep 27, 2026 | |
| Affirm | Count Distinct Underwriting PII Values | Coding | ๐ฅ Sep 27, 2026 | |
| Affirm | Cross-Day User Trust Scores | Coding | ๐ฅ Sep 27, 2026 | |
| Affirm | Propagating Fraud Detector | Coding | ๐ฅ Sep 27, 2026 | |
| Attentive | Lisp Expression Parser | Coding | ๐ฅ Sep 27, 2026 | |
| Attentive | Messages in an Inclusive Timestamp Range | Coding | ๐ฅ Sep 27, 2026 | |
| Bloomberg LP | Lowest Common Ancestor in an N-ary Tree | Coding | ๐ฅ Sep 27, 2026 | |
| Boolean Expression Results After Leaf Flips | Coding | ๐ฅ Sep 27, 2026 | ||
| Merge Hierarchical Trees by Name | Coding | ๐ฅ Sep 27, 2026 | ||
| Verkada | Find the Unique User with Access to Every Camera | Coding | ๐ฅ Sep 27, 2026 | |
| Aurora Innovation | Safe LLM Driving Intent Platform | System design | ๐ฅ Sep 27, 2026 | |
| Microsoft | Maximum Valid Substring Frequency | Coding | ๐ฅ Sep 27, 2026 | |
| Microsoft | Minimum Non-Adjacent Selection Capability | Coding | ๐ฅ Sep 27, 2026 | |
| Stripe | Deployment Window Scheduler | Coding | ๐ฅ Sep 27, 2026 | |
| Snowflake / Dropbox / Temporal / Attentive | Design a Fault-Tolerant Cloud Queue Service | System design | ๐ฅ Sep 27, 2026 | |
| Optiver | Count Straight-Line Word Occurrences in a Grid | Coding | ๐ฅ Sep 27, 2026 | |
| Optiver | Fastest Average Speed over a Rolling Kilometer | Coding | ๐ฅ Sep 27, 2026 | |
| Alternating Direction Jump Game | Coding | ๐ฅ Sep 27, 2026 | ||
| OpenAI | Prefix Matrix Products and Autograd | Coding | ๐ฅ Sep 27, 2026 | |
| Bloomberg LP | Minimum Replacements to Make Two Strings Anagrams | Coding | ๐ฅ Sep 27, 2026 | |
| OpenAI | Modal Lock and Fair Modal Lock | Coding | ๐ฅ Sep 27, 2026 | |
| Build a Combined People Schedule | Coding | ๐ฅ Sep 27, 2026 | ||
| OpenAI / Figma / Cresta / Tekion | Design an Agent Evaluation Platform | System design | ๐ฅ Sep 27, 2026 | |
| Uber / Mercor / Tekion | Design a Persistent Multi-Thread AI Chat | System design | ๐ฅ Sep 27, 2026 | |
| Headway / Expedia | Vacation Rental Search and Booking | System design | ๐ฅ Sep 27, 2026 | |
| Amazon | Minimum Time to Spread Through a Grid | Coding | ๐ฅ Sep 27, 2026 | |
| Amazon | Currency Conversion Rate | Coding | ๐ฅ Sep 27, 2026 | |
| Equal Sum Split After One Removal | Coding | ๐ฅ Sep 27, 2026 | ||
| Addepar | Flat Records to a Hierarchical Tree | Coding | ๐ฅ Sep 27, 2026 | |
| Amazon | Maximum Stock Profit with At Most Two Transactions | Coding | ๐ฅ Sep 27, 2026 | |
| Amazon | House Robber | Coding | ๐ฅ Sep 27, 2026 | |
| Amazon | Lisp Expression Parser | Coding | ๐ฅ Sep 27, 2026 | |
| Amazon | Maximize Consecutive Equal Answers | Coding | ๐ฅ Sep 27, 2026 | |
| Amazon | Most Frequent Name | Coding | ๐ฅ Sep 27, 2026 | |
| Arista Networks | API Bandwidth Allocation | Coding | ๐ฅ Sep 27, 2026 | |
| Arista Networks | LFU Cache | Coding | ๐ฅ Sep 27, 2026 | |
| Expedia | Scramble String | Coding | ๐ฅ Sep 27, 2026 | |
| Expedia | Smallest Sufficient Team | Coding | ๐ฅ Sep 27, 2026 | |
| Balance a Two-Letter String with at Most Two Cuts | Coding | ๐ฅ Sep 27, 2026 | ||
| Find a Good-Subarray Endpoint Pair | Coding | ๐ฅ Sep 27, 2026 | ||
| Tekion | Peak Resource Usage Across Weighted Intervals | Coding | ๐ฅ Sep 27, 2026 | |
| Meta | Deterministic K-Means Assignments | Coding | ๐ฅ Sep 27, 2026 | |
| Merge N-Ary Trees by Key | Coding | ๐ฅ Sep 27, 2026 | ||
| Route Pattern Matcher | Coding | ๐ฅ Sep 27, 2026 | ||
| Course Schedule II | Coding | ๐ฅ Sep 27, 2026 | ||
| Meta | Linear Layer Forward and Backward Passes | Coding | ๐ฅ Sep 27, 2026 | |
| Meta | Reservoir Sampling with Recorded Draws | Coding | ๐ฅ Sep 27, 2026 | |
| Meta | Stochastic Gradient Descent with Momentum | Coding | ๐ฅ Sep 27, 2026 | |
| Meta | Top K Largest Values with a Heap | Coding | ๐ฅ Sep 27, 2026 | |
| Tekion | Design a Durable Agent Workflow Runtime | System design | ๐ฅ Sep 27, 2026 | |
| Amazon | Design an Extensible Financial Account with Charges and Tax | Low-level design | ๐ฅ Sep 27, 2026 | |
| Expedia | Design Collaborative Versioned File Storage | Low-level design | ๐ฅ Sep 27, 2026 | |
| Airwallex | 4Sum Index Quadruples | Coding | ๐ฅ Sep 26, 2026 | |
| IBM | Maximum Points by Deleting Elements | Coding | ๐ฅ Sep 26, 2026 | |
| Suno | Longest Path in a Directed Acyclic Graph | Coding | ๐ฅ Sep 26, 2026 | |
| Suno | Referral Credits After a First Song | Coding | ๐ฅ Sep 26, 2026 | |
| Wayve | Factorial Without Multiplication | Coding | ๐ฅ Sep 26, 2026 | |
| Wayve | Non-Maximum Suppression | Coding | ๐ฅ Sep 26, 2026 | |
| Wayve | Longest Stationary Sensor Interval | Coding | ๐ฅ Sep 26, 2026 | |
| Waabi | Root Mean Square Error | Coding | ๐ฅ Sep 26, 2026 | |
| Rogo | Password From Ordering Hints | Coding | ๐ฅ Sep 26, 2026 | |
| Etched | Periodic Event Loop | Coding | ๐ฅ Sep 26, 2026 | |
| Etched | DMA Stream Distribution | Coding | ๐ฅ Sep 26, 2026 | |
| Modal | Single-Flight Chunk Cache | Coding | ๐ฅ Sep 26, 2026 | |
| Waabi | Autonomous Driving Auto-Labeling Pipeline | System design | ๐ฅ Sep 26, 2026 | |
| Wayve / Waabi | Autonomous Driving Simulation Platform | System design | ๐ฅ Sep 26, 2026 | |
| Modal | Burst-Aware Serverless Task Scheduler | System design | ๐ฅ Sep 26, 2026 | |
| Supabase | Database-Per-Project Control Plane | System design | ๐ฅ Sep 26, 2026 | |
| Wayve / Waabi | Driving Log Ingestion and Query Platform | System design | ๐ฅ Sep 26, 2026 | |
| Supabase | Global Edge Functions Platform | System design | ๐ฅ Sep 26, 2026 | |
| Lambda | High-Throughput ML Object Store | System design | ๐ฅ Sep 26, 2026 | |
| Lambda | Kubernetes GPU Workload Control Plane | System design | ๐ฅ Sep 26, 2026 | |
| Modal | Large Model Artifact Cache | System design | ๐ฅ Sep 26, 2026 | |
| LangChain | LLM Observability and Alerting Platform | System design | ๐ฅ Sep 26, 2026 | |
| Lambda | Multi-Tenant GPU Cluster Scheduler | System design | ๐ฅ Sep 26, 2026 | |
| Supabase | Real-Time Database Change Broadcast | System design | ๐ฅ Sep 26, 2026 | |
| Modal | Warm GPU Container Pool | System design | ๐ฅ Sep 26, 2026 | |
| Rippling | Server Management | Coding | ๐ฅ Sep 26, 2026 | |
| Rippling | Costliest Chocolate | Coding | ๐ฅ Sep 26, 2026 | |
| Rippling | Consistent Logs | Coding | ๐ฅ Sep 26, 2026 | |
| Infosys / Waymo / Goldman Sachs / Onehouse / Amazon / Meta / Flipkart / Luma AI / Motive | Design Ride-Hailing Dispatch and Trip Lifecycle | System design | ๐ฅ Sep 26, 2026 | |
| OpenAI / Commvault / Zomato / Eternal | Design an Online Chess Platform | System design | ๐ฅ Sep 26, 2026 | |
| Pinterest / OpenAI / Axon / Tesla | Design a Blob Storage Service | System design | ๐ฅ Sep 26, 2026 | |
| Salesforce / Replit / Sarvam AI / Microsoft / Gojek / Goldman Sachs / Amazon / Blinkit / Reddit / Qualified Health AI / Suno | Design an Event-Driven Notification System | System design | ๐ฅ Sep 26, 2026 | |
| LinkedIn / Airbyte / Zomato / Eternal | Design an Ads Bidding, Pacing, and Forecast Platform | System design | ๐ฅ Sep 26, 2026 | |
| Expedia / Agoda | Design a Partner Data Aggregation and Query Service | System design | ๐ฅ Sep 26, 2026 | |
| Accenture | Nearest Composite Number | Coding | ๐ฅ Sep 26, 2026 | |
| Goldman Sachs | Dijkstra Shortest Paths in a Weighted Undirected Graph | Coding | ๐ฅ Sep 26, 2026 | |
| Goldman Sachs | Longest Palindromic Subsequence | Coding | ๐ฅ Sep 26, 2026 | |
| Goldman Sachs | Meeting Rooms | Coding | ๐ฅ Sep 26, 2026 | |
| Goldman Sachs | Merge Overlapping Intervals | Coding | ๐ฅ Sep 26, 2026 | |
| Goldman Sachs | Subset Sum to Target | Coding | ๐ฅ Sep 26, 2026 | |
| Goldman Sachs | Trapping Rain Water | Coding | ๐ฅ Sep 26, 2026 | |
| TikTok | Count Subarrays Matching a Comparison Pattern | Coding | ๐ฅ Sep 25, 2026 | |
| TikTok | Partition Matrix by Nonnegative Averages | Coding | ๐ฅ Sep 25, 2026 | |
| TikTok | Count Subarrays with at Least K Equal-Fruit Pairs | Coding | ๐ฅ Sep 25, 2026 | |
| Ramp | Convert Snake Case Variables to Camel Case | Coding | ๐ฅ Sep 25, 2026 | |
| Character.AI | Spreadsheet With Dependent Cells | Coding | ๐ฅ Sep 25, 2026 | |
| Clay | Hierarchical In-Memory File System | Coding | ๐ฅ Sep 25, 2026 | |
| Clay | Workspace File System With Folders and Tables | Coding | ๐ฅ Sep 25, 2026 | |
| LiveKit | AI Support Agent with Guarded Refunds | System design | ๐ฅ Sep 25, 2026 | |
| Alpaca | Large-Scale Messaging Application | System design | ๐ฅ Sep 25, 2026 | |
| Hudson River Trading | Sort Matrix Borders | Coding | ๐ฅ Sep 25, 2026 | |
| Hudson River Trading | Rearrange String by Alternating Ends | Coding | ๐ฅ Sep 25, 2026 | |
| Hudson River Trading | Rectangle Fit Queries | Coding | ๐ฅ Sep 25, 2026 | |
| Hudson River Trading | Round-Robin WDL Order | Coding | ๐ฅ Sep 25, 2026 | |
| Visa | Distinct Chapters Missed During a Cyclic Absence | Coding | ๐ฅ Sep 25, 2026 | |
| Visa | Minimum Values with Even Powers of Two | Coding | ๐ฅ Sep 25, 2026 | |
| Visa | Maximum Non-Decreasing Array Length | Coding | ๐ฅ Sep 25, 2026 | |
| TikTok | Lowest Number in an Open Range | Coding | ๐ฅ Sep 25, 2026 | |
| TikTok | Count One-Swap Number Pairs | Coding | ๐ฅ Sep 25, 2026 | |
| Meta / Amazon | Design Real-Time Chatbot Training and Evaluation | System design | ๐ฅ Sep 25, 2026 | |
| Amazon | Group-Relative Policy Advantages | Coding | ๐ฅ Sep 25, 2026 | |
| Amazon | Grouped-Query Attention with a KV Cache | Coding | ๐ฅ Sep 25, 2026 | |
| Mercor | Minimum Friend API Calls | Coding | ๐ฅ Sep 25, 2026 | |
| Mercor | Park Train Cars by Preference | Coding | ๐ฅ Sep 25, 2026 | |
| Strava | Climb Detection with Recoverable Dips | Coding | ๐ฅ Sep 25, 2026 | |
| UiPath | New 21 Game Probability | Coding | ๐ฅ Sep 25, 2026 | |
| Mercor / Salesforce / Nuro / Rippling | Design a Durable Work Orchestration Platform | System design | ๐ฅ Sep 25, 2026 | |
| Micro1 / Amazon | Design an In-Memory Action Rate Limiter | Low-level design | ๐ฅ Sep 25, 2026 | |
| OpenAI | Design In-Store Merchant Payment Reconciliation | System design | ๐ฅ Sep 25, 2026 | |
| Amazon / Omnissa / Deloitte | Design an Extensible Multi-Channel Alerting Platform | Low-level design | ๐ฅ Sep 25, 2026 | |
| Zscaler / Amazon / Walmart / Stripe / ByteDance / Bloomberg LP | Design a Global Service Metrics Monitoring and Alerting Platform | System design | ๐ฅ Sep 25, 2026 | |
| PayPay / Fox Corporation | Design a Payment Transaction State Machine | Low-level design | ๐ฅ Sep 25, 2026 | |
| Zomato / Eternal / Amazon / Tekion / Motive / Capgemini | Design an Online Ordering Platform | System design | ๐ฅ Sep 25, 2026 | |
| Salesforce / The Trade Desk | Design an Elevator Control System | Low-level design | ๐ฅ Sep 25, 2026 | |
| Goldman Sachs / Meesho | Design a Brokerage Order Processing Domain | Low-level design | ๐ฅ Sep 25, 2026 | |
| Capgemini | Design a Job Application Portal | System design | ๐ฅ Sep 25, 2026 | |
| Capgemini | Design a Learning Management Platform | System design | ๐ฅ Sep 25, 2026 | |
| Bloomberg LP | Currency Conversion Rate | Coding | ๐ฅ Sep 25, 2026 | |
| Agoda | Shortest Subarray With the Full Degree | Coding | ๐ฅ Sep 25, 2026 | |
| Agoda | Disk Space Window Analyzer | Coding | ๐ฅ Sep 25, 2026 | |
| Bloomberg LP | Running Stream Aggregates | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Contains Duplicate | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Detect a Linked-List Cycle | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Longest Substring Without Repeating Characters | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Merge Overlapping Intervals | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Merge Two Sorted Arrays | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Product of Array Except Self | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Search in Rotated Sorted Array | Coding | ๐ฅ Sep 25, 2026 | |
| Capgemini | Top K Frequent Elements | Coding | ๐ฅ Sep 25, 2026 | |
| Fox Corporation | Merge Overlapping Intervals | Coding | ๐ฅ Sep 25, 2026 | |
| Fox Corporation | S-Shaped Matrix Traversal | Coding | ๐ฅ Sep 25, 2026 | |
| JP Morgan Chase | Maximize Minimum Deployment Difficulty | Coding | ๐ฅ Sep 25, 2026 | |
| Kaseya | Best Stock Profit With a Sell Fee | Coding | ๐ฅ Sep 25, 2026 | |
| Moveworks | Underline Shortest Unique Substrings | Coding | ๐ฅ Sep 25, 2026 | |
| Odoo | Same Binary Tree | Coding | ๐ฅ Sep 25, 2026 | |
| Salesforce | Construct a Tree from Level-Order and Inorder Traversals | Coding | ๐ฅ Sep 25, 2026 | |
| Salesforce | Maximize Monsters Defeated | Coding | ๐ฅ Sep 25, 2026 | |
| Zomato / Eternal | Friend Circles and Redundant Connections | Coding | ๐ฅ Sep 25, 2026 | |
| Groww | Design a Good-Till-Trade Order Service | System design | ๐ฅ Sep 25, 2026 | |
| Fox Corporation | Design Payment-Gateway Outage Alerting | System design | ๐ฅ Sep 25, 2026 | |
| Moveworks | Design Read-Only Review Keyword Search | System design | ๐ฅ Sep 25, 2026 | |
| Salesforce | Design Movie Subscription Pricing | Low-level design | ๐ฅ Sep 25, 2026 | |
| Eightfold | Design Recurring Meeting-Room Booking | Low-level design | ๐ฅ Sep 25, 2026 | |
| Odoo | Build FIFO Inventory Costing | AI coding | ๐ฅ Sep 25, 2026 | |
| Groww | Build an Extensible Brokerage Charge Calculator | AI coding | ๐ฅ Sep 25, 2026 | |
| Microsoft | Grid Paths with Override Passes | Coding | ๐ฅ Sep 25, 2026 | |
| Microsoft | Weighted LFU Cache | Coding | ๐ฅ Sep 25, 2026 | |
| Walmart | House Robber | Coding | ๐ฅ Sep 24, 2026 | |
| FalconX | Longest Low-Slippage Execution Window | Coding | ๐ฅ Sep 24, 2026 | |
| Capital One | Distinct Values on Maximum-Sum Frames | Coding | ๐ฅ Sep 24, 2026 | |
| Capital One | Wait Until the Next Bus | Coding | ๐ฅ Sep 24, 2026 | |
| OpenAI | GPU Credit Ledger with a Negative-Balance Failure State | Coding | ๐ฅ Sep 24, 2026 | |
| Visa | Longest Increasing Path in a Matrix | Coding | ๐ฅ Sep 24, 2026 | |
| DoorDash | Simulate an Idempotent Refund Service Flow | Coding | ๐ฅ Sep 24, 2026 | |
| Oracle | Merge One List Between Two Positions | Coding | ๐ฅ Sep 24, 2026 | |
| Oracle | TTL Cache Operations | Coding | ๐ฅ Sep 24, 2026 | |
| Filter Undesired Comments and Their Descendants | Coding | ๐ฅ Sep 24, 2026 | ||
| Meta | Multi-Head Attention Forward Pass | Coding | ๐ฅ Sep 24, 2026 | |
| Oracle | Valid Parentheses | Coding | ๐ฅ Sep 24, 2026 | |
| Oracle | Valid Parenthesis String | Coding | ๐ฅ Sep 24, 2026 | |
| Pylon | Render SQL with a Query Builder | Coding | ๐ฅ Sep 24, 2026 | |
| OpenAI | Evaluate Noisy Annotators | Coding | ๐ฅ Sep 24, 2026 | |
| OpenAI | One-Nearest-Neighbor Classification with Manhattan Distance | Coding | ๐ฅ Sep 24, 2026 | |
| Airbnb | Task Management System | Coding | ๐ฅ Sep 24, 2026 | |
| New Relic | Basic String Compression with Length Guard | Coding | ๐ฅ Sep 24, 2026 | |
| New Relic | Longest Increasing Path in a Matrix | Coding | ๐ฅ Sep 24, 2026 | |
| Microsoft | Count Digit Replacements with No Equal Adjacent Digits | Coding | ๐ฅ Sep 24, 2026 | |
| Microsoft | Maximize Pipeline Throughput Under a Scaling Budget | Coding | ๐ฅ Sep 24, 2026 | |
| Visa | Top Mutual-Friend Recommendations | Coding | ๐ฅ Sep 24, 2026 | |
| Visa | Minimum Power-of-Two Removal Operations | Coding | ๐ฅ Sep 24, 2026 | |
| Visa | Optimal Transfer | Coding | ๐ฅ Sep 24, 2026 | |
| JP Morgan Chase | Same Substring Within Budget | Coding | ๐ฅ Sep 24, 2026 | |
| JP Morgan Chase | Minimum Digit Changes Between String Halves | Coding | ๐ฅ Sep 24, 2026 | |
| Intuit | Amend a Git Commit from Bash | AI coding | ๐ฅ Sep 24, 2026 | |
| Amazon / The Trade Desk / Tekion | Design an In-Memory Publish-Subscribe Library | Low-level design | ๐ฅ Sep 24, 2026 | |
| Citadel / ByteDance / Microsoft / Walmart / ZipRecruiter | Design an Authenticated Shopping Platform | System design | ๐ฅ Sep 24, 2026 | |
| Amazon / Goldman Sachs / Wayfair / Walmart | Design a Multi-Floor Parking Lot | Low-level design | ๐ฅ Sep 24, 2026 | |
| OpenAI | Design a Cloud Coding Workspace | System design | ๐ฅ Sep 24, 2026 | |
| New Relic | Design Long-Running Trace Event Grouping | System design | ๐ฅ Sep 24, 2026 | |
| OpenAI | Design a Distributed Video Generation Platform | System design | ๐ฅ Sep 24, 2026 | |
| Tesla | Design an Electric-Vehicle Charging Platform | System design | ๐ฅ Sep 24, 2026 | |
| Pinterest / Instacart / Amazon / Coupa Software / Visa | Design an Inventory Management Service | System design | ๐ฅ Sep 24, 2026 | |
| Design a Comment-Likelihood Prediction Platform | System design | ๐ฅ Sep 24, 2026 | ||
| Harvey | Design a Long-Horizon Agent Training Environment Platform | System design | ๐ฅ Sep 24, 2026 | |
| Tekion / Amazon / Oracle | Design a Configurable Logging Framework | Low-level design | ๐ฅ Sep 24, 2026 | |
| Airbnb | Progressive Banking System | Coding | ๐ฅ Sep 24, 2026 | |
| OpenAI | Sparse Plant Infection Simulation | Coding | ๐ฅ Sep 24, 2026 | |
| Harvey | Spreadsheet Formula Evaluator | Coding | ๐ฅ Sep 24, 2026 | |
| Capital One | Sort Adjacent Pairs | Coding | ๐ฅ Sep 24, 2026 | |
| Capital One | Count Subarrays Matching a Comparison Pattern | Coding | ๐ฅ Sep 24, 2026 | |
| Capital One | Brightest Position on a Street | Coding | ๐ฅ Sep 24, 2026 | |
| OpenAI | Poker Deal and Hand-Winner Simulation | Coding | ๐ฅ Sep 24, 2026 | |
| Capital One | Alternate String Ends | Coding | ๐ฅ Sep 24, 2026 | |
| DoorDash / Robinhood / Snowflake / Postman / Figma / LinkedIn / Airbnb / Nextdoor / Decagon / Amazon / Cursor / Temporal / Sumo Logic / Zip | Design a Scheduled Job Execution System | System design | ๐ฅ Sep 24, 2026 | |
| SentinelOne / PhonePe | Design a Thread-Safe Queryable Logger Library | Low-level design | ๐ฅ Sep 24, 2026 | |
| Amazon | Capacity To Ship Packages Within D Days | Coding | ๐ฅ Sep 24, 2026 | |
| Amazon | Minimum Cost for Roads and Hospitals | Coding | ๐ฅ Sep 24, 2026 | |
| Amazon | Select K Paired Indices for Maximum Score | Coding | ๐ฅ Sep 24, 2026 | |
| GoodScore | Counting Bits | Coding | ๐ฅ Sep 24, 2026 | |
| GoodScore | Minimum Jumps to Reach Home | Coding | ๐ฅ Sep 24, 2026 | |
| Groww | Sliding Window Maximum | Coding | ๐ฅ Sep 24, 2026 | |
| Morgan Stanley | Generate Strings of Length at Least Three | Coding | ๐ฅ Sep 24, 2026 | |
| Morgan Stanley | Three-Resource 0/1 Knapsack | Coding | ๐ฅ Sep 24, 2026 | |
| PhonePe | Identify Two Failing Tests From an Oracle Transcript | Coding | ๐ฅ Sep 24, 2026 | |
| Amazon | Get Minimum Amount | Coding | ๐ฅ Sep 24, 2026 | |
| Salesforce | Minimum Unique-Character Segments After Deletion | Coding | ๐ฅ Sep 23, 2026 | |
| Microsoft | Copy File Bytes with Partial Writes | Coding | ๐ฅ Sep 23, 2026 | |
| Microsoft | Longest Repeating Character Replacement | Coding | ๐ฅ Sep 23, 2026 | |
| StackAdapt | Build a Tree from Preorder and Inorder Traversals | Coding | ๐ฅ Sep 23, 2026 | |
| StackAdapt | Maximum Bananas Delivered by a Camel | Coding | ๐ฅ Sep 23, 2026 | |
| StackAdapt | Reservoir Sampling with Recorded Draws | Coding | ๐ฅ Sep 23, 2026 | |
| Vercel | Order DAG Nodes from Leaves to Roots | Coding | ๐ฅ Sep 23, 2026 | |
| Amazon | Minimum Edge Moves to Connect a Network | Coding | ๐ฅ Sep 23, 2026 | |
| Amazon | Simplify a Binary Expression Tree | Coding | ๐ฅ Sep 23, 2026 | |
| Mercor | Currency Conversion Rate | Coding | ๐ฅ Sep 23, 2026 | |
| Universal Exit Command Sequence | Coding | ๐ฅ Sep 23, 2026 | ||
| Shortest Pin Path Through Topics | Coding | ๐ฅ Sep 23, 2026 | ||
| Find the Intersection Node of Two Linked Lists | Coding | ๐ฅ Sep 23, 2026 | ||
| Permutations II | Coding | ๐ฅ Sep 23, 2026 | ||
| Remitly | Rebalance Bank Accounts to a Minimum Balance | Coding | ๐ฅ Sep 23, 2026 | |
| Circle | Banking System with Pending Transfer Acceptance | Coding | ๐ฅ Sep 23, 2026 | |
| Apple | Design Authentication Manager | Coding | ๐ฅ Sep 23, 2026 | |
| Ramp | Retryable URL Maze | Coding | ๐ฅ Sep 23, 2026 | |
| Decagon | Batch API Requests with Retry Delays | Coding | ๐ฅ Sep 23, 2026 | |
| Apple | Unit Conversion Across Independent Families | Coding | ๐ฅ Sep 23, 2026 | |
| Best Anagram Match | Coding | ๐ฅ Sep 23, 2026 | ||
| ByteDance | Tic-Tac-Toe Game Over | Coding | ๐ฅ Sep 23, 2026 | |
| Amazon | Environment Variable Store and Substitution | Coding | ๐ฅ Sep 23, 2026 | |
| NinjaTrader | Server Log Summary and Minute Anomalies | Coding | ๐ฅ Sep 23, 2026 | |
| eBay | Maximum Size Subarray Sum Equals K | Coding | ๐ฅ Sep 23, 2026 | |
| Netflix | Capacity-Limited Timed Cache | Coding | ๐ฅ Sep 23, 2026 | |
| Amazon / Postman | Social News Feed With Live Engagement | System design | ๐ฅ Sep 23, 2026 | |
| Amazon / Groww | Design and Implement a Shopping Cart Price Calculator | Low-level design | ๐ฅ Sep 23, 2026 | |
| Apple / OneTrust | Design an Analytical Data Dashboard | System design | ๐ฅ Sep 23, 2026 | |
| Globalization Partners / Coupa Software | Design and Repair a Thread-Safe Configuration Singleton | Low-level design | ๐ฅ Sep 23, 2026 | |
| ByteDance / Groww | Design an Event Booking and Analytics Platform | System design | ๐ฅ Sep 23, 2026 | |
| Coupa Software | Design and Implement an Immutable Customer Profile | Low-level design | ๐ฅ Sep 23, 2026 | |
| Visa | Total Server Downtime | Coding | ๐ฅ Sep 23, 2026 | |
| Microsoft | Maximum Escape Game Score | Coding | ๐ฅ Sep 23, 2026 | |
| Microsoft | K Most Recent Unique Request IDs | Coding | ๐ฅ Sep 23, 2026 | |
| Superhuman | Longest Distinct String | Coding | ๐ฅ Sep 23, 2026 | |
| Superhuman | Minimum Time on Two Processors | Coding | ๐ฅ Sep 23, 2026 | |
| Superhuman | Top Mutual-Friend Recommendations | Coding | ๐ฅ Sep 23, 2026 | |
| Visa | Longest String Chain | Coding | ๐ฅ Sep 23, 2026 | |
| Visa | Maximum Three-Server Difficulty Score | Coding | ๐ฅ Sep 23, 2026 | |
| Visa | Minimize Malware Spread by Removing a Node | Coding | ๐ฅ Sep 23, 2026 | |
| Microsoft | Nearby Restaurant Search Service | System design | ๐ฅ Sep 23, 2026 | |
| Scribd / PostHog / Vanta / Attentive | Design a Product Feature Event Analytics Platform | System design | ๐ฅ Sep 23, 2026 | |
| Microsoft | Design a Desktop Application Notification System | System design | ๐ฅ Sep 23, 2026 | |
| Design a Smile-Detection Evaluation Platform | System design | ๐ฅ Sep 23, 2026 | ||
| Abnormal Security / Apple | Evolve a Read-Write Record Service | System design | ๐ฅ Sep 23, 2026 | |
| Design a Feedback-Aware Cluster Workload Scheduler | System design | ๐ฅ Sep 23, 2026 | ||
| Amazon | Design a Large-Model Inference Serving Platform | System design | ๐ฅ Sep 23, 2026 | |
| Atlassian | Design a Searchable Emoji Picker | System design | ๐ฅ Sep 23, 2026 | |
| Amazon | Design a Pizza Ordering Domain | Low-level design | ๐ฅ Sep 23, 2026 | |
| Instacart | Evaluate Formulas with Cycle Detection | Coding | ๐ฅ Sep 23, 2026 | |
| Instacart | Product Total With the Cheapest Promotion | Coding | ๐ฅ Sep 23, 2026 | |
| Instacart | Process Shopping Records, Promotions, and Display Order | Coding | ๐ฅ Sep 23, 2026 | |
| Optiver | Power Cell Bank | Coding | ๐ฅ Sep 23, 2026 | |
| Perplexity AI | In-Memory Filesystem Commands | Coding | ๐ฅ Sep 23, 2026 | |
| Instacart | Sort Products by Aisle With Frozen Items Last | Coding | ๐ฅ Sep 23, 2026 | |
| Harvey | Design Human-Governed File Review Agents | System design | ๐ฅ Sep 22, 2026 | |
| Anthropic / Snap Inc. / Lyft / Fivetran / Temporal | One-to-One Chat Service | System design | ๐ฅ Sep 22, 2026 | |
| PayPay | Design a Coupon Generation and Redemption Service | System design | ๐ฅ Sep 22, 2026 | |
| Postman | Design an API Request Workspace | System design | ๐ฅ Sep 22, 2026 | |
| Mercor | Design Context Window Management for an AI Assistant | System design | ๐ฅ Sep 22, 2026 | |
| Snowflake | Design Memory for an AI Assistant | System design | ๐ฅ Sep 22, 2026 | |
| Mercor | Design Prompt Injection Defenses for an AI Agent | System design | ๐ฅ Sep 22, 2026 | |
| PayPay | Design a Pluggable Random Value Library | Low-level design | ๐ฅ Sep 22, 2026 | |
| Verkada | Build a Camera Communication API | AI coding | ๐ฅ Sep 22, 2026 | |
| Cresta | Build a Conversational Flight Booking Agent | AI coding | ๐ฅ Sep 22, 2026 | |
| Intuit | Oldest and Youngest Employees | SQL | ๐ฅ Sep 22, 2026 | |
| Intuit | Pressure-Isolation Shutdown Order | Coding | ๐ฅ Sep 22, 2026 | |
| Intuit | Submask Sum Queries | Coding | ๐ฅ Sep 22, 2026 | |
| Minimize Absolute Difference of Server Loads | Coding | ๐ฅ Sep 22, 2026 | ||
| Decreasing Subsequences | Coding | ๐ฅ Sep 22, 2026 | ||
| Hudson River Trading | Product Minus Sum of Digits | Coding | ๐ฅ Sep 22, 2026 | |
| Hudson River Trading | Rightmost Longest Character Run | Coding | ๐ฅ Sep 22, 2026 | |
| Hudson River Trading | Dynamic Sum Pair Queries | Coding | ๐ฅ Sep 22, 2026 | |
| Cursor | Filesystem Hash Tree | Coding | ๐ฅ Sep 22, 2026 | |
| Amazon | Path Through an O/X Grid Using Only Right and Down | Coding | ๐ฅ Sep 22, 2026 | |
| Capital One | Count One-Swap Number Pairs | Coding | ๐ฅ Sep 22, 2026 | |
| Cursor | Diff Two Filesystem Hash Trees | Coding | ๐ฅ Sep 22, 2026 | |
| Ease | Linear-Probing Key-Value Store | Coding | ๐ฅ Sep 22, 2026 | |
| Fivetran | Execute In-Memory SQL Storage Operations | Coding | ๐ฅ Sep 22, 2026 | |
| Most Active Caller by Distinct Contacts | Coding | ๐ฅ Sep 22, 2026 | ||
| Top K Users by Distinct Contacts | Coding | ๐ฅ Sep 22, 2026 | ||
| Harvey | Retrieve Vectors by Cosine Similarity | Coding | ๐ฅ Sep 22, 2026 | |
| Mercor | Process Refunds with Bounded Retries | Coding | ๐ฅ Sep 22, 2026 | |
| Netflix | Convert Sparse Records to a Filled Table | Coding | ๐ฅ Sep 22, 2026 | |
| Netflix | Sparse Matrix Multiplication | Coding | ๐ฅ Sep 22, 2026 | |
| OpenAI | Iterate Canonical IPv6 Addresses | Coding | ๐ฅ Sep 22, 2026 | |
| Physical Intelligence | LRU Cache Operations | Coding | ๐ฅ Sep 22, 2026 | |
| Snowflake | Sliding-Window Rate Limiter | Coding | ๐ฅ Sep 22, 2026 | |
| Stripe | Validate Six-Column Business CSV Rows | Coding | ๐ฅ Sep 22, 2026 | |
| Visa | Shortest Digit Prefix for Target Multisets | Coding | ๐ฅ Sep 22, 2026 | |
| Pinterest / Slack / Motive | Design a Typeahead Suggestion Service | System design | ๐ฅ Sep 21, 2026 | |
| JP Morgan Chase / Google / Decagon | Internal AI Assistant for Employees | System design | ๐ฅ Sep 21, 2026 | |
| Tesla | Monorepo Build and Vehicle Software Rollout | System design | ๐ฅ Sep 21, 2026 | |
| Implement a Product Read-Through Cache | AI coding | ๐ฅ Sep 21, 2026 | ||
| Abnormal Security / Ninja Van | Concurrent Worker Processing Platform | System design | ๐ฅ Sep 21, 2026 | |
| In-Memory Typeahead Trie Service | System design | ๐ฅ Sep 21, 2026 | ||
| Tekion | Design and Implement a TTL Cache Library | Low-level design | ๐ฅ Sep 21, 2026 | |
| Amazon | Edit Distance | Coding | ๐ฅ Sep 21, 2026 | |
| Amazon | Word Ladder | Coding | ๐ฅ Sep 21, 2026 | |
| Amazon | Trapping Rain Water | Coding | ๐ฅ Sep 21, 2026 | |
| Amazon | Allocate Minimum Pages | Coding | ๐ฅ Sep 21, 2026 | |
| Amazon | Longest Subarray with K Distinct Values | Coding | ๐ฅ Sep 21, 2026 | |
| Tekion | Largest Rectangle in Histogram | Coding | ๐ฅ Sep 21, 2026 | |
| Tekion | Next Greater Element to the Right | Coding | ๐ฅ Sep 21, 2026 | |
| Visa | Sum of Index-Ordered Pair Differences | Coding | ๐ฅ Sep 21, 2026 | |
| Tesla | Flatten a Branched List into a Doubly Linked List | Coding | ๐ฅ Sep 21, 2026 | |
| Oscar Health | Longest Name Chain in a Directed Acyclic Graph | Coding | ๐ฅ Sep 21, 2026 | |
| OpenAI | GPU Credit Ledger | Coding | ๐ฅ Sep 21, 2026 | |
| Cresta | Dynamic Least-Loaded Job Dispatcher | Coding | ๐ฅ Sep 21, 2026 | |
| Decagon | Versioned Recipe Shopping Cart | Coding | ๐ฅ Sep 21, 2026 | |
| OpenAI | Determine the Winner of Three-Card Hands | Coding | ๐ฅ Sep 21, 2026 | |
| Apple | First Successful Concurrent API Result Before a Timeout | Coding | ๐ฅ Sep 21, 2026 | |
| Waymo | Vehicle Maintenance Event Readiness | Coding | ๐ฅ Sep 21, 2026 | |
| Shortest Way to Form a Target String | Coding | ๐ฅ Sep 21, 2026 | ||
| Escape Room Leaderboard | Coding | ๐ฅ Sep 21, 2026 | ||
| Policy Violation Set Checks | Coding | ๐ฅ Sep 21, 2026 | ||
| Affirm | Assign Sequential Loan Identifiers | Coding | ๐ฅ Sep 21, 2026 | |
| Affirm | Normalize Loan Merchants to Root Businesses | Coding | ๐ฅ Sep 21, 2026 | |
| Mercury | Sliding Window Rate Limiter | Coding | ๐ฅ Sep 20, 2026 | |
| Amazon / Meta / ByteDance / Harvey / Clio / Microsoft | Design a Cloud File Storage System | System design | ๐ฅ Sep 20, 2026 | |
| Harvey / Nike, Inc. / GEP / Microsoft | Grounded Document-Vault Question Answering | System design | ๐ฅ Sep 20, 2026 | |
| Offline Multi-Device Data Sync | System design | ๐ฅ Sep 20, 2026 | ||
| Amazon | Repair MovieDB Follows and Notifications | AI coding | ๐ฅ Sep 20, 2026 | |
| Count Score Categories | Coding | ๐ฅ Sep 20, 2026 | ||
| Book Reading Evenings | Coding | ๐ฅ Sep 20, 2026 | ||
| Capital One | Obstacle Placement Queries | Coding | ๐ฅ Sep 20, 2026 | |
| Minimum Number of Chairs | Coding | ๐ฅ Sep 20, 2026 | ||
| Harvey | Highlight and Rank Overlapping Citations | Coding | ๐ฅ Sep 20, 2026 | |
| BlackRock | Lowest Common Ancestor in a Parent Tree | Coding | ๐ฅ Sep 20, 2026 | |
| BlackRock | Valid Parentheses | Coding | ๐ฅ Sep 20, 2026 | |
| Capital One | Circular High-Low Pattern | Coding | ๐ฅ Sep 20, 2026 | |
| Capital One | Find a Symbolic Matrix Pattern | Coding | ๐ฅ Sep 20, 2026 | |
| Citadel | Merge Price-Delta Feeds | Coding | ๐ฅ Sep 20, 2026 | |
| Harvey | Evaluate an Expression Map | Coding | ๐ฅ Sep 20, 2026 | |
| Harvey | Find Duplicate Files in a Filesystem | Coding | ๐ฅ Sep 20, 2026 | |
| Harvey | Highlight Matching Phrases | Coding | ๐ฅ Sep 20, 2026 | |
| Harvey | In-Memory Vault File System | Coding | ๐ฅ Sep 20, 2026 | |
| Rippling | Numeric Poker Operations | Coding | ๐ฅ Sep 20, 2026 | |
| Snap Inc. | Render an Org Chart and Find Skip-Level Pairs | Coding | ๐ฅ Sep 20, 2026 | |
| Kotak Mahindra Bank | Course Schedule | Coding | ๐ฅ Sep 20, 2026 | |
| Kotak Mahindra Bank | House Robber II | Coding | ๐ฅ Sep 20, 2026 | |
| Kotak Mahindra Bank | Trapping Rain Water | Coding | ๐ฅ Sep 20, 2026 | |
| Inverse-Depth Nested List Sum | Coding | ๐ฅ Sep 20, 2026 | ||
| GoodScore | Design and Implement a Thread-Safe In-Memory Task Queue | Low-level design | ๐ฅ Sep 19, 2026 | |
| GoodScore | Count Divisible Power Sums | Coding | ๐ฅ Sep 19, 2026 | |
| Stripe | Incident Monitor | Coding | ๐ฅ Sep 19, 2026 | |
| Databricks | Chat API and Database System | System design | ๐ฅ Sep 19, 2026 | |
| Microsoft | AI Receptionist Voice Chat | System design | ๐ฅ Sep 19, 2026 | |
| Airbnb | Customer Support Resolution Assistant | System design | ๐ฅ Sep 19, 2026 | |
| Walleye Capital | Equity Research Decision Intelligence | System design | ๐ฅ Sep 19, 2026 | |
| Microsoft | Global One-to-One Voice Calling | System design | ๐ฅ Sep 19, 2026 | |
| Atlassian | Social Post Comments | System design | ๐ฅ Sep 19, 2026 | |
| Airbnb | Vacation Rental Candidate Ranking | System design | ๐ฅ Sep 19, 2026 | |
| Capital One | Rank Flights by Airline and Destination Frequency | SQL | ๐ฅ Sep 19, 2026 | |
| Hudson River Trading | Sorted Absolute-Difference Sums Across Cyclic Shifts | Coding | ๐ฅ Sep 19, 2026 | |
| Hudson River Trading | Minimize Expression Value with Parentheses | Coding | ๐ฅ Sep 19, 2026 | |
| Hudson River Trading | Obstacle Placement Queries | Coding | ๐ฅ Sep 19, 2026 | |
| Amazon | Maximize Adjacent Difference With One Reversal | Coding | ๐ฅ Sep 19, 2026 | |
| Amazon | Shortest Grid Path With One Wall Break | Coding | ๐ฅ Sep 19, 2026 | |
| Databricks | Rectangular K-in-a-Row | Coding | ๐ฅ Sep 19, 2026 | |
| Airbnb | Print Sentences as Table | Coding | ๐ฅ Sep 19, 2026 | |
| Atlassian | Music Player Operation Sequence | Coding | ๐ฅ Sep 19, 2026 | |
| Databricks | Customer Revenue with Direct Referrals | Coding | ๐ฅ Sep 19, 2026 | |
| Indeed | Insert into an Unrolled Linked List | Coding | ๐ฅ Sep 19, 2026 | |
| Microsoft | First Duplicate Value | Coding | ๐ฅ Sep 19, 2026 | |
| Microsoft | Keyed Bounded Executor Schedule | Coding | ๐ฅ Sep 19, 2026 | |
| Microsoft | 3Sum | Coding | ๐ฅ Sep 19, 2026 | |
| Oracle | Island Count and Maximum Area | Coding | ๐ฅ Sep 19, 2026 | |
| Oracle | Retry with an Attempt Limit | Coding | ๐ฅ Sep 19, 2026 | |
| Tata Consultancy Services | Maximum Gap After Sorting | Coding | ๐ฅ Sep 18, 2026 | |
| Tata Consultancy Services | EV Charging Cost Optimization | Coding | ๐ฅ Sep 18, 2026 | |
| Amazon | Inventory Allocation | Coding | ๐ฅ Sep 18, 2026 | |
| Waymo | Obstacle-Aware Return to Origin | Coding | ๐ฅ Sep 18, 2026 | |
| Waymo | Dictionary Matches from Repeated Letters | Coding | ๐ฅ Sep 18, 2026 | |
| Amazon | Design File-System Search with Symlink Safety | Low-level design | ๐ฅ Sep 18, 2026 | |
| Amazon | Design a Large-Scale File Change Watcher | System design | ๐ฅ Sep 18, 2026 | |
| Amazon | Design Robot-Assisted Restaurant Orchestration | System design | ๐ฅ Sep 18, 2026 | |
| Amazon | LRU Cache for Query Results | Coding | ๐ฅ Sep 18, 2026 | |
| AMD | K Largest Elements with Quickselect | Coding | ๐ฅ Sep 18, 2026 | |
| Sliding Window Average Excluding the Largest K Values | Coding | ๐ฅ Sep 18, 2026 | ||
| Instacart | Timed Task Management | Coding | ๐ฅ Sep 18, 2026 | |
| Instacart | Worker Management with Promotions and Double-Paid Time | Coding | ๐ฅ Sep 18, 2026 | |
| Microsoft | Convert Hexadecimal to Dotted IPv4 | Coding | ๐ฅ Sep 18, 2026 | |
| Microsoft | Parse a Signed Integer in Any Base | Coding | ๐ฅ Sep 18, 2026 | |
| Microsoft | Reconstruct Digits from Jumbled English Words | Coding | ๐ฅ Sep 18, 2026 | |
| Microsoft | Stable Unique Column Renames | Coding | ๐ฅ Sep 18, 2026 | |
| Straight-Line Word Search | Coding | ๐ฅ Sep 18, 2026 | ||
| Render | Top-K IP Addresses Across Log Files | Coding | ๐ฅ Sep 18, 2026 | |
| Robinhood | Fractional Share Inventory Flattening | Coding | ๐ฅ Sep 18, 2026 | |
| Robinhood | Unique Transitive Dependent Counts | Coding | ๐ฅ Sep 18, 2026 | |
| Roblox | Candy Crush Grid Matching and Gravity | Coding | ๐ฅ Sep 18, 2026 | |
| Roblox | Count and Score Distinct Hat Assignments | Coding | ๐ฅ Sep 18, 2026 | |
| Snowflake | Connect Four from the Last Move | Coding | ๐ฅ Sep 18, 2026 | |
| Together AI | Balanced File Partitions Without Splitting Lines | Coding | ๐ฅ Sep 18, 2026 | |
| The Voleon Group | Words with Repeated Anagrams | Coding | ๐ฅ Sep 18, 2026 | |
| Wayfair | UCB1 Multi-Armed Bandit Trace | Coding | ๐ฅ Sep 18, 2026 | |
| Amazon | Course Order and Cycle | Coding | ๐ฅ Sep 18, 2026 | |
| Rippling | Corporate Card Expense Rules | Coding | ๐ฅ Sep 18, 2026 | |
| Amazon | Design an Employee Directory and Organization Hierarchy | System design | ๐ฅ Sep 18, 2026 | |
| JioStar | Design Streaming Home Personalization | System design | ๐ฅ Sep 18, 2026 | |
| JioStar | Design and Implement a Parameterized Configuration Library | Low-level design | ๐ฅ Sep 18, 2026 | |
| Amazon | Minimum Stick Connection Cost | Coding | ๐ฅ Sep 18, 2026 | |
| Capital One | Format a Newspaper Page | Coding | ๐ฅ Sep 18, 2026 | |
| Capital One | Compare Counts Around Pivot | Coding | ๐ฅ Sep 18, 2026 | |
| Capital One | Reconstruct Landmark Journey | Coding | ๐ฅ Sep 18, 2026 | |
| Capital One | Linear Warehouse Drone Delivery | Coding | ๐ฅ Sep 18, 2026 | |
| Two Sigma | Sewer Drainage Partition | Coding | ๐ฅ Sep 18, 2026 | |
| Uber | Large Structured Data Filesystem | System design | ๐ฅ Sep 18, 2026 | |
| Intuit | Longest Uninterrupted Work Block | Coding | ๐ฅ Sep 18, 2026 | |
| Uber | Shortest Increasing Path to a Target | Coding | ๐ฅ Sep 18, 2026 | |
| Uber | Zigzag Board Adjacent Swaps | Coding | ๐ฅ Sep 18, 2026 | |
| IBM | Customer Resource Usage Analysis | SQL | ๐ฅ Sep 18, 2026 | |
| IBM | Tool Changer | Coding | ๐ฅ Sep 18, 2026 | |
| Unattributed | Filter and Batch Concurrent Logs | AI coding | ๐ฅ Sep 17, 2026 | |
| Citadel | Top Ten Trades by Notional Value | Coding | ๐ฅ Sep 17, 2026 | |
| Citadel | Reconcile Unmatched Trades with Timestamp Tolerance | Coding | ๐ฅ Sep 17, 2026 | |
| Uber | First Unique IP Hitting the Server | Coding | ๐ฅ Sep 17, 2026 | |
| Microsoft | Design Distributed LLM Embedding and Output Sharding | System design | ๐ฅ Sep 17, 2026 | |
| Postman / Uber Freight / LinkedIn | Design a Calendar Event Collaboration System | System design | ๐ฅ Sep 17, 2026 | |
| Amazon / Airwallex / Apple / Wex / Confluent / Oracle / Motive / Grab | Design a Ticket Booking System | System design | ๐ฅ Sep 17, 2026 | |
| Confluent / Oracle | Design a Durable Disposable Email Service | System design | ๐ฅ Sep 17, 2026 | |
| Susquehanna International Group (SIG) | Leftmost Memory Block Allocator | Coding | ๐ฅ Sep 17, 2026 | |
| Susquehanna International Group (SIG) | Sort Matrix Borders | Coding | ๐ฅ Sep 17, 2026 | |
| Fox Corporation | Design a Model-Version-Aware Derived-Data Cache | System design | ๐ฅ Sep 17, 2026 | |
| Oracle | Design Data-Loss Prevention and Recovery for a Distributed Store | System design | ๐ฅ Sep 17, 2026 | |
| Oracle | Design Stable API and Database Pagination | System design | ๐ฅ Sep 17, 2026 | |
| Kotak Mahindra Bank | Design a Food Delivery Order Domain | Low-level design | ๐ฅ Sep 17, 2026 | |
| Kotak Mahindra Bank | Design a Showroom Vehicle Booking and Loan Workflow | Low-level design | ๐ฅ Sep 17, 2026 | |
| Fox Corporation | Design and Implement a Structured Content Query Library | Low-level design | ๐ฅ Sep 17, 2026 | |
| Binary Tree Zigzag Level Order Traversal | Coding | ๐ฅ Sep 17, 2026 | ||
| LRU Cache with Hit and Miss Counters | Coding | ๐ฅ Sep 17, 2026 | ||
| Max Points on a Line | Coding | ๐ฅ Sep 17, 2026 | ||
| Maximum Depth of Binary Tree | Coding | ๐ฅ Sep 17, 2026 | ||
| Stripe | Rule-Driven Transaction Fraud Detection | Coding | ๐ฅ Sep 17, 2026 | |
| Applied Intuition | Compilation Order with Topological Sort | Coding | ๐ฅ Sep 17, 2026 | |
| Minimum Window Substring | Coding | ๐ฅ Sep 17, 2026 | ||
| Meta | Values Exclusive to the Current User | Coding | ๐ฅ Sep 17, 2026 | |
| Plaid | Validate and Resolve Evaluation Chains | Coding | ๐ฅ Sep 17, 2026 | |
| Plaid | Total Pipeline Completion Time | Coding | ๐ฅ Sep 17, 2026 | |
| Snowflake | Minimum Bus Fleet Across Stations | Coding | ๐ฅ Sep 17, 2026 | |
| SpaceX | Timestamped Telemetry Stream Differences | Coding | ๐ฅ Sep 17, 2026 | |
| Together AI | Time-Indexed Key-Value Store | Coding | ๐ฅ Sep 17, 2026 | |
| Waymo | Cyclic Fuel Command Simulation | Coding | ๐ฅ Sep 17, 2026 | |
| Zip | Maximum Survival Time in a Graph Pursuit | Coding | ๐ฅ Sep 17, 2026 | |
| Zip | Cache Ticket Alerts for Approval | AI coding | ๐ Sep 16, 2026 | |
| IBM | Repair Event Pre-Save Validation | AI coding | ๐ Sep 16, 2026 | |
| Tesla | Swap Even and Odd Bits | Coding | ๐ Sep 16, 2026 | |
| Stripe | Split Tender Transactions Part 1 - Basic Split Tendering | Coding | ๐ Sep 16, 2026 | |
| Anthropic | Design a Communication-Efficient Distributed Median Aggregation | System design | ๐ Sep 16, 2026 | |
| Anthropic | Design a Communication-Efficient Distributed Mode Aggregation | System design | ๐ Sep 16, 2026 | |
| DoorDash | Build a Refund DAG with Local HTTP Services | AI coding | ๐ Sep 16, 2026 | |
| DoorDash | Debug Two Routing Strategies | AI coding | ๐ Sep 16, 2026 | |
| DoorDash | Integrate Three Profile Services | AI coding | ๐ Sep 16, 2026 | |
| Gatik AI | Design a Configurable Point-Cloud Transformation Pipeline | Low-level design | ๐ Sep 16, 2026 | |
| Airbnb | Design a Booking-Lifecycle Metrics Model | System design | ๐ Sep 16, 2026 | |
| Amazon | Design a Music Click-Through Prediction Platform | System design | ๐ Sep 16, 2026 | |
| Latent | Design a Prior-Authorization Worklist and Digest | System design | ๐ Sep 16, 2026 | |
| ByteDance | Design Multi-Tenant Agent Quota Accounting | System design | ๐ Sep 16, 2026 | |
| Malicious IP Traffic Filtering Platform | System design | ๐ Sep 16, 2026 | ||
| OpenAI / Baseten / Amazon | Design a Stateless Generative AI Chat Service | System design | ๐ Sep 16, 2026 | |
| IBM | Minimum Additions to Make a Valid ABC String | Coding | ๐ Sep 16, 2026 | |
| IBM | Social Network Relationship Statistics | SQL | ๐ Sep 16, 2026 | |
| Salesforce | Design Coffee-Shop Ordering and Fulfillment | System design | ๐ Sep 16, 2026 | |
| Amazon / Goldman Sachs / Salesforce / Harness | Design an In-Memory Job Scheduler | Low-level design | ๐ Sep 16, 2026 | |
| Netflix / Amazon | Design a Parking Lot with Flexible Fees | Low-level design | ๐ Sep 16, 2026 | |
| Amazon | Design a Continental Temperature Heatmap | System design | ๐ Sep 16, 2026 | |
| DocuSign | Design a Live Location Tracking Service | System design | ๐ Sep 16, 2026 | |
| ThoughtSpot | Design a Priority-Aware Database Request Gateway | System design | ๐ Sep 16, 2026 | |
| DocuSign | Design a Resilient E-Commerce Checkout | System design | ๐ Sep 16, 2026 | |
| Rubrik | Design Cross-Region Versioned Map Reconciliation | System design | ๐ Sep 16, 2026 | |
| Harness | Design Rolling Top-N Movie Recommendations | System design | ๐ Sep 16, 2026 | |
| Rubrik | Design a Thread-Safe One-Dimensional Parking Lot | Low-level design | ๐ Sep 16, 2026 | |
| Walmart | Repair Movie Watchlist Synchronization | AI coding | ๐ Sep 16, 2026 | |
| Robinhood | Top Ten Most Frequent Words in a Book | Coding | ๐ Sep 16, 2026 | |
| Salesforce | LFU Cache | Coding | ๐ Sep 16, 2026 | |
| DoorDash | Random Dasher Set Operations | Coding | ๐ Sep 16, 2026 | |
| Salesforce | Run-Length String Compression | Coding | ๐ Sep 16, 2026 | |
| Anthropic | Profiling Events from Consecutive Stack Samples | Coding | ๐ Sep 16, 2026 | |
| Time-Ordered Elevator Dispatch | Coding | ๐ Sep 16, 2026 | ||
| Agoda | Count Values Appearing Exactly Once | Coding | ๐ Sep 16, 2026 | |
| Agoda | Longest All-Present Attendance Streak | Coding | ๐ Sep 16, 2026 | |
| Airbnb | Median Home Price by City | Coding | ๐ Sep 16, 2026 | |
| Airbnb | Superhost Eligibility | Coding | ๐ Sep 16, 2026 | |
| Anthropic | Confirmed Profiling Events with First-Observed Starts | Coding | ๐ Sep 16, 2026 | |
| Anthropic | Convert Stack Samples to Trace Events | Coding | ๐ Sep 16, 2026 | |
| Apple | Canonical N-Ary Tree Codec | Coding | ๐ Sep 16, 2026 | |
| Apple | Implement Hit Counter | Coding | ๐ Sep 16, 2026 | |
| Decagon | Rolling CSAT Tracker | Coding | ๐ Sep 16, 2026 | |
| Trim a Binary Search Tree to a Range | Coding | ๐ Sep 16, 2026 | ||
| Users with a Short Sign-In Session | Coding | ๐ Sep 16, 2026 | ||
| Meta | First Bad Version in a Monotone Array | Coding | ๐ Sep 16, 2026 | |
| Meta | Parenthesized String Calculator | Coding | ๐ Sep 16, 2026 | |
| Netflix | Custom Record and Free-Form Field Parser | Coding | ๐ Sep 16, 2026 | |
| Otter.ai | Versioned Key-Value Store with Commits | Coding | ๐ Sep 16, 2026 | |
| Minimum Bus Routes to a Destination | Coding | ๐ Sep 16, 2026 | ||
| Shortest Sequence of Source Subsequences | Coding | ๐ Sep 16, 2026 | ||
| Rippling | Common Ancestors in a Directed Acyclic Graph | Coding | ๐ Sep 16, 2026 | |
| Robinhood | Friendship and Balance Tracker | Coding | ๐ Sep 16, 2026 | |
| Robinhood | Service Dependency Load Factors | Coding | ๐ Sep 16, 2026 | |
| Salesforce | Flatten Nested Map Paths with a Stack | Coding | ๐ Sep 16, 2026 | |
| Siemens | Padded Vector Batch Pipeline | Coding | ๐ Sep 16, 2026 | |
| Squarepoint Capital | Mutable Record Store with Error Results | Coding | ๐ Sep 16, 2026 | |
| Stripe | Monthly Latest-Balance Reconciliation | Coding | ๐ Sep 16, 2026 | |
| Tesla | Reduce-Based Map and Filter Pipeline | Coding | ๐ Sep 16, 2026 | |
| Walmart | Maximum Points by Deleting Elements | Coding | ๐ Sep 16, 2026 | |
| Mercor | Repair a Concurrent Read-Through Cache | AI coding | ๐ Sep 15, 2026 | |
| Design Merchant Product Catalog Ingestion | System design | ๐ Sep 15, 2026 | ||
| Hadrian / DigitalOcean | Design a Live Relational Database Migration | System design | ๐ Sep 15, 2026 | |
| Meta | Design a Social Game Score Leaderboard | System design | ๐ Sep 15, 2026 | |
| Amazon | Repair Django Ticket Creation and Replies | AI coding | ๐ Sep 15, 2026 | |
| Concentric AI | Design an Institute Attendance Management Platform | System design | ๐ Sep 15, 2026 | |
| Hudson River Trading | Tiered Expiring Item Store | Coding | ๐ Sep 15, 2026 | |
| Vercel | Recent Metrics by Name and Tags | Coding | ๐ Sep 15, 2026 | |
| Nearest Eligible Elevator | Coding | ๐ Sep 15, 2026 | ||
| DigitalOcean | Maximum Value from Circular Houses | Coding | ๐ Sep 15, 2026 | |
| DigitalOcean | Longest Repeating Character Replacement | Coding | ๐ Sep 15, 2026 | |
| Meta | Mutual-Friend Recommendations | Coding | ๐ Sep 15, 2026 | |
| Meta | Partition a Card Deck into Fifteens | Coding | ๐ Sep 15, 2026 | |
| OpenAI | Dependency-Aware Agent Task Scheduler | Coding | ๐ Sep 15, 2026 | |
| OpenAI | Durable Work Queue Operations | Coding | ๐ Sep 15, 2026 | |
| Robinhood | Transitive Employee Referral Counts | Coding | ๐ Sep 15, 2026 | |
| Amazon | Design Usage Billing for One Account | Low-level design | ๐ Sep 14, 2026 | |
| Amazon | Root-to-Leaf Paths with a Target Sum | Coding | ๐ Sep 14, 2026 | |
| Amazon | First Non-Repeating Character | Coding | ๐ Sep 14, 2026 | |
| Unattributed | Design and Implement a Concurrency-Safe Wallet | Low-level design | ๐ Sep 14, 2026 | |
| Akuna Capital | Count Server Replacements | Coding | ๐ Sep 14, 2026 | |
| Akuna Capital | Maximum Remaining Drone Power | Coding | ๐ Sep 14, 2026 | |
| Two Sigma | Online No-Intercept Linear Regression | Coding | ๐ Sep 14, 2026 | |
| Two Sigma | Linear Interpolator | Coding | ๐ Sep 14, 2026 | |
| Two Sigma | Daily Temperature By Town | SQL | ๐ Sep 14, 2026 | |
| Akuna Capital | Vowel Substring Game | Coding | ๐ Sep 14, 2026 | |
| Rippling | Filter, Sort, and Deduplicate Scheduled Tasks | Coding | ๐ Sep 14, 2026 | |
| Goldman Sachs | Design a Pastebin Text Sharing Service | System design | ๐ Sep 14, 2026 | |
| OpenAI | Payment Hold, Charge, and Settlement | System design | ๐ Sep 14, 2026 | |
| Airwallex | Design an Authoritative Grid Chase Game | System design | ๐ Sep 14, 2026 | |
| Stripe | Financial Account Ledger | Coding | ๐ Sep 14, 2026 | |
| Goldman Sachs | Staircase Search In A Sorted Matrix | Coding | ๐ Sep 14, 2026 | |
| Goldman Sachs | Insert, Delete, And Get Random In Constant Time | Coding | ๐ Sep 14, 2026 | |
| Goldman Sachs | Dungeon Health | Coding | ๐ Sep 14, 2026 | |
| Goldman Sachs | Least Recently Used Cache | Coding | ๐ Sep 14, 2026 | |
| Vanta | Implement uniq: Unique Lines | Coding | ๐ Sep 14, 2026 | |
| Airwallex | Paginated K-Way Unique Merge | Coding | ๐ Sep 14, 2026 | |
| Applied Intuition | Merge Overlapping Closed Intervals | Coding | ๐ Sep 14, 2026 | |
| Citadel | Exchange BBO and Market-Wide NBBO | Coding | ๐ Sep 14, 2026 | |
| Restricted Decimal Number Validator | Coding | ๐ Sep 14, 2026 | ||
| Second Minimum in a Tournament Tree | Coding | ๐ Sep 14, 2026 | ||
| The Walt Disney Company | Resizable Array-Backed Integer Set | Coding | ๐ Sep 14, 2026 | |
| Rippling | Design a Personalized News Aggregation Platform | System design | ๐ Sep 13, 2026 | |
| Determine Whether Two Horses Are Genetically Related | Coding | ๐ Sep 13, 2026 | ||
| JP Morgan Chase | Spark Cluster Sizing for a 100 GB Workload | System design | ๐ Sep 13, 2026 | |
| Tekion / JP Morgan Chase | Design a Resilient Multi-Table ETL Pipeline | System design | ๐ Sep 13, 2026 | |
| JPMorgan Chase | Employees Above Average Salary | SQL | ๐ Sep 13, 2026 | |
| JPMorgan Chase | Highest-Earning Employees By Department | SQL | ๐ Sep 13, 2026 | |
| Juspay | Sum Dynamic Weighted Tree Distances | Coding | ๐ Sep 13, 2026 | |
| Juspay | Minimum of Fixed-Window Maxima | Coding | ๐ Sep 13, 2026 | |
| Lenskart | Most Recent Active User Per Department | SQL | ๐ Sep 13, 2026 | |
| Lenskart | Test Execution Success Rate | SQL | ๐ Sep 13, 2026 | |
| Lenskart | First Duplicate Transaction Within Ten Minutes | SQL | ๐ Sep 13, 2026 | |
| Amazon / Postman / Mintlify / Walmart / Vercel | Design a Collaborative Document Editor | System design | ๐ Sep 13, 2026 | |
| Cursor / Amazon | Design a Versioned IDE Settings Sync System | System design | ๐ Sep 13, 2026 | |
| Amazon | Design a Return Drop-Store Booking System | Low-level design | ๐ Sep 13, 2026 | |
| Amazon | Design a Playlist Source Mixer | Low-level design | ๐ Sep 13, 2026 | |
| Amazon | Global Music Streaming Platform | System design | ๐ Sep 13, 2026 | |
| Amazon | Design an Amazon Locker System | System design | ๐ Sep 13, 2026 | |
| Amazon | Design a Scalable Artifact Repository | System design | ๐ Sep 13, 2026 | |
| Amazon | Design Device Backup and Restore | System design | ๐ Sep 13, 2026 | |
| Amazon | Design an Extensible Shipping Cost Calculator | Low-level design | ๐ Sep 13, 2026 | |
| Split and Sort Array | Coding | ๐ Sep 13, 2026 | ||
| Minimum Number Of Moves to Obtain | Coding | ๐ Sep 13, 2026 | ||
| Amazon | Reorganize a String | Coding | ๐ Sep 13, 2026 | |
| Amazon | Count Stepping Numbers In Range | Coding | ๐ Sep 13, 2026 | |
| Amazon | Container With Most Water | Coding | ๐ Sep 13, 2026 | |
| Amazon | Cheapest Flights Within K Stops | Coding | ๐ Sep 13, 2026 | |
| Amazon | Find Median from Data Stream | Coding | ๐ Sep 13, 2026 | |
| Amazon | Basic Calculator | Coding | ๐ Sep 13, 2026 | |
| Amazon | Distance Between Two Tree Nodes | Coding | ๐ Sep 13, 2026 | |
| Amazon | Course Schedule | Coding | ๐ Sep 13, 2026 | |
| Amazon | Longest Increasing Subsequence With Bounded Adjacent Difference | Coding | ๐ Sep 13, 2026 | |
| Amazon | Search in a Rotated Sorted Array | Coding | ๐ Sep 13, 2026 | |
| Amazon | Task Scheduler | Coding | ๐ Sep 13, 2026 | |
| Amazon | Merge Intervals | Coding | ๐ Sep 13, 2026 | |
| Amazon | K Closest Elements in a Sorted Array | Coding | ๐ Sep 13, 2026 | |
| Amazon | Fare Between Stops on a Train Route | Coding | ๐ Sep 13, 2026 | |
| Amazon | Find the Safest Path in a Grid | Coding | ๐ Sep 13, 2026 | |
| Amazon | Stack with Constant-Time Middle Queries | Coding | ๐ Sep 13, 2026 | |
| Amazon | Decode an Encoded String | Coding | ๐ Sep 13, 2026 | |
| Amazon | Minimum Moves for Two Knights to Meet | Coding | ๐ Sep 13, 2026 | |
| Amazon | Bit at an Index After Repeated Binary Expansion | Coding | ๐ Sep 13, 2026 | |
| Amazon | Minimum Window Substring | Coding | ๐ Sep 13, 2026 | |
| Amazon | First Unique Character in a Stream | Coding | ๐ Sep 13, 2026 | |
| Amazon | Maximize Distance to the Closest Occupied Seat | Coding | ๐ Sep 13, 2026 | |
| Amazon | Validate a Two-Color Chessboard | Coding | ๐ Sep 13, 2026 | |
| Amazon | Longest Common Subsequence Length | Coding | ๐ Sep 13, 2026 | |
| Amazon | Count Uni-Valued Subtrees | Coding | ๐ Sep 13, 2026 | |
| Amazon | Next Palindromic Time | Coding | ๐ Sep 13, 2026 | |
| Amazon | Kth Smallest Sum from Sorted Matrix Rows | Coding | ๐ Sep 13, 2026 | |
| Amazon | Meeting Room Scheduler | Coding | ๐ Sep 13, 2026 | |
| Amazon | Aggressive Cows | Coding | ๐ Sep 13, 2026 | |
| Amazon | E-commerce Notification Router | Coding | ๐ Sep 13, 2026 | |
| Amazon | Unique String Permutations | Coding | ๐ Sep 13, 2026 | |
| Amazon | Three Sum Closest | Coding | ๐ Sep 13, 2026 | |
| Amazon | Course Schedule II | Coding | ๐ Sep 13, 2026 | |
| Amazon | Product of Array Except Self | Coding | ๐ Sep 13, 2026 | |
| Amazon | Maximum Sum BST in a Binary Tree | Coding | ๐ Sep 13, 2026 | |
| Amazon | Initial and Final Accounts in a Transfer Chain | Coding | ๐ Sep 13, 2026 | |
| Amazon | Minimize Malware Spread in a Facility Network | Coding | ๐ Sep 13, 2026 | |
| Amazon | Running Delivery Time Medians | Coding | ๐ Sep 13, 2026 | |
| Amazon | Maximum Non-Adjacent House Value | Coding | ๐ Sep 13, 2026 | |
| Amazon | Employee Ratings Management System | Coding | ๐ Sep 13, 2026 | |
| Amazon | Binary Tree Cameras | Coding | ๐ Sep 13, 2026 | |
| Amazon | Remove Duplicate Letters for the Largest Result | Coding | ๐ Sep 13, 2026 | |
| Amazon | Merge k Sorted Lists | Coding | ๐ Sep 13, 2026 | |
| Amazon | Nodes at a Given N-ary Tree Level | Coding | ๐ Sep 13, 2026 | |
| Amazon | Max Consecutive Ones III | Coding | ๐ Sep 13, 2026 | |
| Amazon | Maximum Profit in Job Scheduling | Coding | ๐ Sep 13, 2026 | |
| Amazon | All Anagram Start Indices | Coding | ๐ Sep 13, 2026 | |
| Amazon | Count Islands with Eight-Direction Adjacency | Coding | ๐ Sep 13, 2026 | |
| Amazon | Maximum Saw Height for At Least M Cut Length | Coding | ๐ Sep 13, 2026 | |
| Amazon | Unique Pairs in a 2D Matrix Summing to Target | Coding | ๐ Sep 13, 2026 | |
| Amazon | First Missing Positive | Coding | ๐ Sep 13, 2026 | |
| Amazon | Word Break II | Coding | ๐ Sep 13, 2026 | |
| Amazon | Word Break | Coding | ๐ Sep 13, 2026 | |
| Amazon | Binary Tree Right View | Coding | ๐ Sep 13, 2026 | |
| Amazon | Next Permutation | Coding | ๐ Sep 13, 2026 | |
| Amazon | Construct a Tree from Level-Order and Inorder Traversals | Coding | ๐ Sep 13, 2026 | |
| Amazon | Longest Happy Prefix | Coding | ๐ Sep 13, 2026 | |
| Balanced Parentheses with Sequential Left Deletions | Coding | ๐ Sep 13, 2026 | ||
| Amazon | Calculate Beauty Values | Coding | ๐ Sep 13, 2026 | |
| Scribd | Build a Reliable Event Write Handler | AI coding | ๐ Sep 13, 2026 | |
| Scribd | Design an External-Model Document Enrichment Pipeline | System design | ๐ Sep 13, 2026 | |
| ByteDance / Google | Design a Multimedia Content Moderation Platform | System design | ๐ Sep 13, 2026 | |
| Citadel | Maximize Workday Earnings | Coding | ๐ Sep 13, 2026 | |
| Scribd | Most Popular Actor by Movie Views | Coding | ๐ Sep 13, 2026 | |
| Amazon | Design Burst-Tolerant Notification Ingestion | System design | ๐ Sep 13, 2026 | |
| Morgan Stanley | Maximum Concurrent Processes | Coding | ๐ Sep 12, 2026 | |
| Lexicographically Smallest K-Step Return Walk | Coding | ๐ Sep 12, 2026 | ||
| Tekion | Dungeon Game | Coding | ๐ Sep 12, 2026 | |
| Tekion | IPO | Coding | ๐ Sep 12, 2026 | |
| Hudson River Trading | Lowest Number in an Open Range | Coding | ๐ Sep 12, 2026 | |
| Hudson River Trading | Catch Fish with Reusable Baits | Coding | ๐ Sep 12, 2026 | |
| Hudson River Trading | Maximum Rhombic Area Sum | Coding | ๐ Sep 12, 2026 | |
| Hudson River Trading | Count One-Swap Number Pairs | Coding | ๐ Sep 12, 2026 | |
| Apple | Merge Two Strings by Maximum Boundary Overlap | Coding | ๐ Sep 12, 2026 | |
| SquadStack.ai | Minimum-Cost Digit String Decoding | Coding | ๐ Sep 12, 2026 | |
| SquadStack.ai | Minimum Seats for One-Way Car Pooling | Coding | ๐ Sep 12, 2026 | |
| SquadStack.ai | Find the Dominant Seller | SQL | ๐ Sep 12, 2026 | |
| Amazon / Goldman Sachs | Repair recurring payments in the Wallet backend | AI coding | ๐ Sep 12, 2026 | |
| Bobyard | Design an Ordered Canvas Operation Coordinator | Low-level design | ๐ Sep 12, 2026 | |
| Design and Implement a Highway Toll Session Domain | Low-level design | ๐ Sep 12, 2026 | ||
| ByteDance | Design an Advertiser Campaign Configuration Platform | System design | ๐ Sep 12, 2026 | |
| Bobyard | Design an Asynchronous Random Image Generation Service | System design | ๐ Sep 12, 2026 | |
| Amazon | Word Search II | Coding | ๐ Sep 12, 2026 | |
| Amazon | Interleaving String | Coding | ๐ Sep 12, 2026 | |
| Amazon | Dynamic Prefix Search Collection | Coding | ๐ Sep 12, 2026 | |
| Read-Optimized Duplicate Windows | Coding | ๐ Sep 12, 2026 | ||
| Max Stack | Coding | ๐ Sep 12, 2026 | ||
| Agoda | Design a Flight Search and Booking Aggregator | System design | ๐ Sep 11, 2026 | |
| Blinkit | Design a Food Delivery Order Tracking System | System design | ๐ Sep 11, 2026 | |
| The D.E. Shaw Group | Design a Ride-Hailing Class Model | Low-level design | ๐ Sep 11, 2026 | |
| FlexTrade | Extract Error Log Context | Coding | ๐ Sep 11, 2026 | |
| Blinkit | LRU Cache | Coding | ๐ Sep 11, 2026 | |
| Blinkit | Search in Rotated Sorted Array | Coding | ๐ Sep 11, 2026 | |
| Brex | Concurrent Discounted Card Purchases | Coding | ๐ Sep 11, 2026 | |
| The D. E. Shaw Group | Decode Ways | Coding | ๐ Sep 11, 2026 | |
| The D. E. Shaw Group | Remove K Digits | Coding | ๐ Sep 11, 2026 | |
| Kickdrum | Students and Instructors for Database Systems | SQL | ๐ Sep 11, 2026 | |
| Kickdrum | Undo/Redo Timeline State Engine | Coding | ๐ Sep 11, 2026 | |
| Kickdrum | Wormhole Spacecraft Overtakes | Coding | ๐ Sep 11, 2026 | |
| Replit | Compress Editor Actions into Operational Transform Operations | Coding | ๐ Sep 11, 2026 | |
| Toptal | Valid Times on a Digital Clock | Coding | ๐ Sep 11, 2026 | |
| FlexTrade | Design Fault Localization for a Large Function Graph | System design | ๐ Sep 11, 2026 | |
| FlexTrade | Diagnose a Three-Stage Data Pipeline Latency Regression | System design | ๐ Sep 11, 2026 | |
| FlexTrade | Diagnose Memory Growth in a Long-Running Process | System design | ๐ Sep 11, 2026 | |
| Goldman Sachs | Repair Event Pre-Save Validation | AI coding | ๐ Sep 11, 2026 | |
| Goldman Sachs | Minimum Distinct Prefix Cost | Coding | ๐ Sep 11, 2026 | |
| Anthropic | Design a Gang-Scheduled GPU Inference Pool | System design | ๐ Sep 11, 2026 | |
| Wayfair | Design an Audio Fingerprint Recognition Service | System design | ๐ Sep 11, 2026 | |
| Wayfair | Design a Rental Product Circulation Domain | Low-level design | ๐ Sep 11, 2026 | |
| Charta Health | Concurrent Token-Bucket Rate Limiter | Coding | ๐ Sep 11, 2026 | |
| Lyft | Minimum Window Substring | Coding | ๐ Sep 11, 2026 | |
| Arista Networks | First Missing Number in a Consecutive Array | Coding | ๐ Sep 11, 2026 | |
| ByteDance | Delete K Values to Balance Index Sums | Coding | ๐ Sep 11, 2026 | |
| Capital One | Digit-Coded Card Validation | Coding | ๐ Sep 11, 2026 | |
| Charta Health | Inorder Successor in a Binary Search Tree | Coding | ๐ Sep 11, 2026 | |
| Coinbase | Task Management System | Coding | ๐ Sep 11, 2026 | |
| Fireworks AI | Mutual-Friend Referral Recommendations | Coding | ๐ Sep 11, 2026 | |
| Uniform 0-6 from an Unknown Biased Bit | Coding | ๐ Sep 11, 2026 | ||
| Lyft | Globally Versioned Key-Value Store | Coding | ๐ Sep 11, 2026 | |
| Nextdoor | In-Memory Database with Transactions and Savepoints | Coding | ๐ Sep 11, 2026 | |
| Pure Storage | Rasterize a Circle with Integer Pixels | Coding | ๐ Sep 11, 2026 | |
| Pure Storage | One-Shot Callback Event Dispatch | Coding | ๐ Sep 11, 2026 | |
| Snorkel AI | Snapshot Map with Sparse Version History | Coding | ๐ Sep 11, 2026 | |
| Wayfair | Container With Most Water | Coding | ๐ Sep 11, 2026 | |
| Wayfair | Assign Distinct Letter Values to Minimize XOR | Coding | ๐ Sep 11, 2026 | |
| Wayfair | Moving Cost by Volume and Category | Coding | ๐ Sep 11, 2026 | |
| Waymo | Shortest Paths to Multiple Targets | Coding | ๐ Sep 11, 2026 | |
| Amazon | Repair MovieDB Search and Recommendations | AI coding | ๐ Sep 11, 2026 | |
| Ambience Healthcare | Design a Medical Case ICD-10 Suggestion System | System design | ๐ Sep 11, 2026 | |
| Ambience Healthcare | Autoregressive Token Generation | Coding | ๐ Sep 11, 2026 | |
| Ambience Healthcare | Dynamic Batch Completion Times | Coding | ๐ Sep 11, 2026 | |
| Amazon | Page Referrer Reachability | Coding | ๐ Sep 10, 2026 | |
| IBM | Alphabetically Smallest Palindrome | Coding | ๐ Sep 10, 2026 | |
| Akuna Capital | Items Sort | Coding | ๐ Sep 10, 2026 | |
| Akuna Capital | Two Sum | Coding | ๐ Sep 10, 2026 | |
| Akuna Capital | Longest Substring Without Repeating Characters | Coding | ๐ Sep 10, 2026 | |
| OnePay / Razorpay / Infosys | Durable Messaging Chat System | System design | ๐ Sep 10, 2026 | |
| Atlassian / Abnormal Security | Audit a Service Architecture for Reliability | System design | ๐ Sep 10, 2026 | |
| Attentive / Oracle / Amperity / Snap Inc. / Waabi | Design a Time Series Metrics Database | System design | ๐ Sep 10, 2026 | |
| Apple | Design Multi-Data-Center Storage Demand Forecasting | System design | ๐ Sep 10, 2026 | |
| Apple | Design Predictive File Storage-Tier Placement | System design | ๐ Sep 10, 2026 | |
| Snap Inc. | Build a Persistent Chat Backend | AI coding | ๐ Sep 10, 2026 | |
| Snap Inc. | Design a Pre-Login Risk Challenge Service | System design | ๐ Sep 10, 2026 | |
| LinkedIn / Rippling | Design a Recent User-Activity Query System | System design | ๐ Sep 10, 2026 | |
| Anthropic | Implement Concurrent Image Transformations | AI coding | ๐ Sep 10, 2026 | |
| Salesforce / American Express / Booking.com | Design a Goal-Driven Tool-Using Agent | System design | ๐ Sep 10, 2026 | |
| TikTok | Catch Fish with Reusable Baits | Coding | ๐ Sep 10, 2026 | |
| TikTok | Maximum Rhombic Area Sum | Coding | ๐ Sep 10, 2026 | |
| Akuna Capital | Delivery Management System | Coding | ๐ Sep 10, 2026 | |
| Akuna Capital | Binary Circuit | Coding | ๐ Sep 10, 2026 | |
| Akuna Capital | K Smallest Substring | Coding | ๐ Sep 10, 2026 | |
| Stripe | Build a Task and Subtask Hierarchy | Coding | ๐ Sep 10, 2026 | |
| Snap Inc. | Sort Characters by Frequency | Coding | ๐ Sep 10, 2026 | |
| Shortest Word Transformation Sequence | Coding | ๐ Sep 10, 2026 | ||
| Validate a Single-Letter Word Sequence | Coding | ๐ Sep 10, 2026 | ||
| Oracle | Maximum of Window Minimums | Coding | ๐ Sep 10, 2026 | |
| Oracle | Classify Tree Nodes with SQL | SQL | ๐ Sep 10, 2026 | |
| OpenAI | Aggregate Machine Topology | Coding | ๐ Sep 10, 2026 | |
| Thread-Safe LRU Cache with TTL | Coding | ๐ Sep 10, 2026 | ||
| Find Leaves of a Binary Tree | Coding | ๐ Sep 10, 2026 | ||
| Shortest Round Trip Through All Deliveries | Coding | ๐ Sep 10, 2026 | ||
| Real-Time Temperature Window Statistics | Coding | ๐ Sep 10, 2026 | ||
| Out-of-Order Logger Rate Limiter | Coding | ๐ Sep 10, 2026 | ||
| Lowest Common Manager for Employee Groups | Coding | ๐ Sep 10, 2026 | ||
| Epic | Minimum Adjacent Transpositions | Coding | ๐ Sep 10, 2026 | |
| Epic | Telephone Keypad String Encoding | Coding | ๐ Sep 10, 2026 | |
| Epic | First Completed Mingo Line | Coding | ๐ Sep 10, 2026 | |
| Epic | Character Frequencies in First-Appearance Order | Coding | ๐ Sep 10, 2026 | |
| ByteDance | Path Existence in an Undirected Graph | Coding | ๐ Sep 10, 2026 | |
| ByteDance | Binary Tree Target-Sum Paths | Coding | ๐ Sep 10, 2026 | |
| Booking.com | Project JSON Fields into a Target Format | Coding | ๐ Sep 10, 2026 | |
| Anthropic | Find Duplicate File Groups | Coding | ๐ Sep 10, 2026 | |
| Amazon | Sliding-Window Rate Limiter | Coding | ๐ Sep 10, 2026 | |
| Amazon | Longest Substring Without Repeating Characters | Coding | ๐ Sep 10, 2026 | |
| Amazon | Most Frequent Consecutive Website Pattern | Coding | ๐ Sep 10, 2026 | |
| Amazon | Recent Advertisement Click Counts | Coding | ๐ Sep 10, 2026 | |
| Blinkit | Find a Peak Element | Coding | ๐ Sep 10, 2026 | |
| Blinkit | LFU Cache | Coding | ๐ Sep 10, 2026 | |
| IBM | Count Strictly Increasing Contiguous Windows | Coding | ๐ Sep 10, 2026 | |
| Infosys | Count Reachable Values by Halving and Decrementing | Coding | ๐ Sep 10, 2026 | |
| Infosys | Minimum Paid Swaps to Group Ones and Twos | Coding | ๐ Sep 10, 2026 | |
| MakeMyTrip.com | Bounded ProducerโConsumer Queue | Coding | ๐ Sep 10, 2026 | |
| MakeMyTrip.com | Detect a Cycle in a Directed Graph | Coding | ๐ Sep 10, 2026 | |
| MakeMyTrip.com | Parallel Workers with a Per-Phase Barrier | Coding | ๐ Sep 10, 2026 | |
| MakeMyTrip.com | Count Subarrays with Sum K | Coding | ๐ Sep 10, 2026 | |
| Salesforce | Kth Largest Element in an Array | Coding | ๐ Sep 10, 2026 | |
| Salesforce | LRU Cache | Coding | ๐ Sep 10, 2026 | |
| Salesforce | Rotting Oranges | Coding | ๐ Sep 10, 2026 | |
| Salesforce | Maximum Stock Profit with Unlimited Transactions | Coding | ๐ Sep 10, 2026 | |
| Get My Parking | Remove Duplicates From Sorted Array In Place | Coding | ๐ Sep 09, 2026 | |
| Infosys | Assign Cookies With Matching Parity | Coding | ๐ Sep 09, 2026 | |
| Infosys | Count Equal Code Pairs Within Distance K | Coding | ๐ Sep 09, 2026 | |
| Infosys | Detect Substring In Any Rotation | Coding | ๐ Sep 09, 2026 | |
| Infosys | Enumerate All Subsequences | Coding | ๐ Sep 09, 2026 | |
| Infosys | Daily Successful Transactions Per Department | SQL | ๐ Sep 09, 2026 | |
| Infosys | Product Of Array Except Self | Coding | ๐ Sep 09, 2026 | |
| Infosys | Longest Substring Without Repeating Characters | Coding | ๐ Sep 09, 2026 | |
| ZS | Top Salaries By Department | SQL | ๐ Sep 09, 2026 | |
| ZS | Fifth Highest Salary In A Department | SQL | ๐ Sep 09, 2026 | |
| ZS | Find Duplicate Email Addresses | SQL | ๐ Sep 09, 2026 | |
| Commvault | Missing and Repeated Number | Coding | ๐ Sep 09, 2026 | |
| JPMorgan Chase | Minimum Meeting Rooms | Coding | ๐ Sep 09, 2026 | |
| JPMorgan Chase | Maximum Game Board Score | Coding | ๐ Sep 09, 2026 | |
| Capital One | Sorted Extended Matrix Diagonals | Coding | ๐ Sep 09, 2026 | |
| Amazon | Find Minimum Cost | Coding | ๐ Sep 09, 2026 | |
| Millennium | Debug the Tape Cleaner | SQL | ๐ Sep 09, 2026 | |
| Millennium | Regression Hedge | SQL | ๐ Sep 09, 2026 | |
| Millennium | Client Markout Analysis | SQL | ๐ Sep 09, 2026 | |
| Millennium | Clean the Tape | SQL | ๐ Sep 09, 2026 | |
| Millennium | Measure Liquidity | SQL | ๐ Sep 09, 2026 | |
| Millennium | Debug Fair-Value Lookup | SQL | ๐ Sep 09, 2026 | |
| Millennium | Calculate the Half Spread | Coding | ๐ Sep 09, 2026 | |
| Millennium | Quote One Request | Coding | ๐ Sep 09, 2026 | |
| Millennium | Debug the Impact Model | Coding | ๐ Sep 09, 2026 | |
| Millennium | Track the Book and Mark Final PnL | SQL | ๐ Sep 09, 2026 | |
| Millennium | Risk Limits and Inventory Skew | Coding | ๐ Sep 09, 2026 | |
| Millennium | Debug the Risk-Limit Quoter | Coding | ๐ Sep 09, 2026 | |
| Millennium | Hedge Inventory with Return Covariance | SQL | ๐ Sep 09, 2026 | |
| Walmart | Distinct Bitwise-OR Scores of Increasing Subsequences | Coding | ๐ Sep 09, 2026 | |
| Maximum Coins With Moving Tokens | Coding | ๐ Sep 09, 2026 | ||
| Maximum Elements With a Common Digit | Coding | ๐ Sep 09, 2026 | ||
| Perplexity AI | Design Durable Long-Running Agentic Query Execution | System design | ๐ Sep 09, 2026 | |
| Syfe | Design A Token-Limited Multi-Profile Chat | System design | ๐ Sep 09, 2026 | |
| Syfe | Design Flash-Sale Notification Fanout | System design | ๐ Sep 09, 2026 | |
| Syfe | Allocate And Release Brokerage Inventory | Low-level design | ๐ Sep 09, 2026 | |
| Commvault | Design a Chess Move Validation Model | Low-level design | ๐ Sep 09, 2026 | |
| Get My Parking | List Failed And TTL-Expired Pending Payments | Low-level design | ๐ Sep 09, 2026 | |
| Waymo / Nuro | Design a Distributed Simulation Platform | System design | ๐ Sep 09, 2026 | |
| OpenAI | Design a Device Demand-Response Control System | System design | ๐ Sep 09, 2026 | |
| Design a High-Throughput Single-Node Key-Value Store | System design | ๐ Sep 09, 2026 | ||
| Tesla | Design a Content Delivery Network | System design | ๐ Sep 09, 2026 | |
| Nuro / Motive | Design a Vehicle Sensor and Obstacle Data Platform | System design | ๐ Sep 09, 2026 | |
| Nuro | Design Petabyte-Scale Range Search for Large Rows | System design | ๐ Sep 09, 2026 | |
| Verkada | Build SQLite-Backed GET and POST Endpoints | AI coding | ๐ Sep 09, 2026 | |
| Tekion | Open Lockers After Toggle Passes | Coding | ๐ Sep 09, 2026 | |
| Tekion | Coin Game From The Ends | Coding | ๐ Sep 09, 2026 | |
| Tesla | Resilient Fake API Client | Coding | ๐ Sep 09, 2026 | |
| Stripe | Rank Linked Merchants by Weighted Shared Attributes | Coding | ๐ Sep 09, 2026 | |
| Stripe | Project and Filter Structured Records | Coding | ๐ Sep 09, 2026 | |
| Strala | Evaluate Live Spreadsheet Expressions | Coding | ๐ Sep 09, 2026 | |
| Square | Map Black Cells to Covering 2x2 Blocks | Coding | ๐ Sep 09, 2026 | |
| Runloop | In-Memory Meeting Room Manager | Coding | ๐ Sep 09, 2026 | |
| Roblox | Track Received Byte Ranges | Coding | ๐ Sep 09, 2026 | |
| Roblox | Robot Navigation Around Lasers | Coding | ๐ Sep 09, 2026 | |
| Reducto | Recover Document Hierarchy from Indentation | Coding | ๐ Sep 09, 2026 | |
| OpenAI | Online Chess Move Validation | Coding | ๐ Sep 09, 2026 | |
| OpenAI | Count Friend Circles | Coding | ๐ Sep 09, 2026 | |
| Nuro | Versioned Key-Value Store with Suffix Truncation | Coding | ๐ Sep 09, 2026 | |
| Nuro | Trapping Rain Water | Coding | ๐ Sep 09, 2026 | |
| Nuro | Thread-Safe Task Storage and Worker Dispatch | Coding | ๐ Sep 09, 2026 | |
| Nuro | Group Sparse Points by Distance Threshold | Coding | ๐ Sep 09, 2026 | |
| Nuro | Course Ordering with Concurrent Updates | Coding | ๐ Sep 09, 2026 | |
| Schedule Tasks with an Interval Tree | Coding | ๐ Sep 09, 2026 | ||
| Explore an Unknown Grid and Find a Path | Coding | ๐ Sep 09, 2026 | ||
| Minimum Root-to-Leaf Cut Cost | Coding | ๐ Sep 09, 2026 | ||
| Longest Consecutive Same-Color Line | Coding | ๐ Sep 09, 2026 | ||
| DoorDash | Dasher Active Time | Coding | ๐ Sep 09, 2026 | |
| Databricks | Rolling Hit Counter | Coding | ๐ Sep 09, 2026 | |
| Citadel | Reference-Counted Deduplicating File System | Coding | ๐ Sep 09, 2026 | |
| Apple | Palindrome Match Percentage | Coding | ๐ Sep 09, 2026 | |
| Anthropic | Crawl Same-Hostname URLs Concurrently | Coding | ๐ Sep 09, 2026 | |
| Amazon | Meeting Rooms II | Coding | ๐ Sep 08, 2026 | |
| Nvidia | Check Endianness Of A Byte Array | Coding | ๐ Sep 08, 2026 | |
| Nvidia | Reverse A String | Coding | ๐ Sep 08, 2026 | |
| Nvidia | Implement Malloc | Coding | ๐ Sep 08, 2026 | |
| Nvidia | Middle Node Of A Linked List | Coding | ๐ Sep 08, 2026 | |
| Nvidia | Merge Two Arrays Into Sorted Order | Coding | ๐ Sep 08, 2026 | |
| Amazon | Remove K Digits | Coding | ๐ Sep 08, 2026 | |
| Amazon | Next Smaller Ticket Price | Coding | ๐ Sep 08, 2026 | |
| Uber | Per-Element Hit Counter | Coding | ๐ Sep 08, 2026 | |
| Uber | My Calendar I | Coding | ๐ Sep 08, 2026 | |
| Wex | Longest Substring Without Repeating Characters | Coding | ๐ Sep 08, 2026 | |
| Wex | Word Break II | Coding | ๐ Sep 08, 2026 | |
| Freshworks | LFU Cache | Coding | ๐ Sep 08, 2026 | |
| Freshworks | Product Of Array Except Self | Coding | ๐ Sep 08, 2026 | |
| Microsoft | Count Numbers with the Same Set-Bit Count | Coding | ๐ Sep 08, 2026 | |
| Microsoft | Equalize Arrays with Prefix and Suffix Increments | Coding | ๐ Sep 08, 2026 | |
| Amazon | Maximum System Memory Capacity | Coding | ๐ Sep 08, 2026 | |
| Stripe | Asynchronous Payment Event Processing | Coding | ๐ Sep 08, 2026 | |
| Capital One | Count Good Tuples | Coding | ๐ Sep 08, 2026 | |
| Capital One | Diagonal Robot Path Sum | Coding | ๐ Sep 08, 2026 | |
| Capital One | Rectangle Fit Queries | Coding | ๐ Sep 08, 2026 | |
| Capital One | Round-Robin WDL Order | Coding | ๐ Sep 08, 2026 | |
| IBM | Plus Mult Array | Coding | ๐ Sep 08, 2026 | |
| IBM | Get Maximum Amount | Coding | ๐ Sep 08, 2026 | |
| TikTok | Analyze Taxi Driver and Ride Metrics | SQL | ๐ Sep 08, 2026 | |
| DRW | Largest Number With Even Digit Frequencies | Coding | ๐ Sep 08, 2026 | |
| DRW | Count Balanced Nodes in a Rooted Tree | Coding | ๐ Sep 08, 2026 | |
| TikTok | Reverse Letters in Pairs | Coding | ๐ Sep 08, 2026 | |
| TikTok | Count Alternating Tile Groups | Coding | ๐ Sep 08, 2026 | |
| TikTok | Build Blocks from a Starting Position | Coding | ๐ Sep 08, 2026 | |
| TikTok | Find Local Maxima in Sensor Data | Coding | ๐ Sep 08, 2026 | |
| TikTok | Gradient Descent Linear Regression from Scratch | Coding | ๐ Sep 08, 2026 | |
| TikTok | Decision Tree Classifier from Scratch | Coding | ๐ Sep 08, 2026 | |
| HSBC | Distinct Products After Removing One Element | Coding | ๐ Sep 08, 2026 | |
| HSBC | Minimum Cleaning Robot Runs | Coding | ๐ Sep 08, 2026 | |
| Optiver | Overheat Prevention Controller | Coding | ๐ Sep 08, 2026 | |
| Amazon | Repair Workflow Issue and Sub-Issue Creation | AI coding | ๐ Sep 08, 2026 | |
| Jane Street | Design a Cross-Exchange Arbitrage Engine | Low-level design | ๐ Sep 08, 2026 | |
| Wex | Design a Threshold Logging and Alerting Model | Low-level design | ๐ Sep 08, 2026 | |
| Salesforce | Ludo Game Object Model | Low-level design | ๐ Sep 08, 2026 | |
| OpenAI | Design an Offline-Capable IoT Log Platform | System design | ๐ Sep 08, 2026 | |
| ByteDance | Design Observability for AI Agent Tool Calls | System design | ๐ Sep 08, 2026 | |
| Waymo | Shortest Distance from All Buildings | Coding | ๐ Sep 08, 2026 | |
| Waymo | Deterministic Depth-First Graph Traversal | Coding | ๐ Sep 08, 2026 | |
| OpenAI | In-Memory Key-Value Store Operations | Coding | ๐ Sep 08, 2026 | |
| Microsoft | Count Binary Substrings | Coding | ๐ Sep 08, 2026 | |
| IBM | Tree Pythagorean Triples | Coding | ๐ Sep 08, 2026 | |
| IBM | Flight Delay Propagation | Coding | ๐ Sep 08, 2026 | |
| ByteDance | Enumerate Directed Paths and Cycles | Coding | ๐ Sep 08, 2026 | |
| Airbnb | In-Memory File System | Coding | ๐ Sep 08, 2026 | |
| Visa | Planning Production | Coding | ๐ Sep 08, 2026 | |
| Visa | Subarray Sum | Coding | ๐ Sep 08, 2026 | |
| Visa | Minimum Anagram Period | Coding | ๐ Sep 08, 2026 | |
| Snowflake | Generating Login Codes | Coding | ๐ Sep 07, 2026 | |
| Snowflake | String Formation (Also for AI/ML Software Engineer Intern :) | Coding | ๐ Sep 07, 2026 | |
| Nubank | Design Chargeback Ingestion and Eligible-Record Export | System design | ๐ Sep 07, 2026 | |
| Wells Fargo | Event Statistics Aggregator | Coding | ๐ Sep 07, 2026 | |
| Wells Fargo | Ordered Deployment Configuration Validator | Coding | ๐ Sep 07, 2026 | |
| Stripe | Evolving Merchant Clusters and Persistent Pins | Coding | ๐ Sep 06, 2026 | |
| Rippling | Delivery Cost Tracker with Effective-Dated Rates | Coding | ๐ Sep 06, 2026 | |
| Medallion | Design an Automated Achievement Certificate System | System design | ๐ Sep 06, 2026 | |
| Anthropic | Design Telemetry Name Reconciliation | System design | ๐ Sep 06, 2026 | |
| Oracle | Top-K URLs Overall and in the Last 24 Hours | Coding | ๐ Sep 05, 2026 | |
| Oracle | Maximum Subarray Sum with Length at Most K | Coding | ๐ Sep 05, 2026 | |
| ByteDance | Least Recently Used Cache | Coding | ๐ Sep 05, 2026 | |
| Capital One | Count Digits 0, 2, and 4 | Coding | ๐ Sep 05, 2026 | |
| Capital One | Inventory Discount Tracker | Coding | ๐ Sep 05, 2026 | |
| Capital One | Count Alternating Tile Groups | Coding | ๐ Sep 05, 2026 | |
| Amazon | Get Distinct Pairs | Coding | ๐ Sep 05, 2026 | |
| Oracle | Design a Rolling Top Error-Services Monitor | System design | ๐ Sep 05, 2026 | |
| Oracle | Design a Rolling Top-Users Event Leaderboard | System design | ๐ Sep 05, 2026 | |
| Rippling | Design a Publisher News Feed | System design | ๐ Sep 05, 2026 | |
| Paytm | Design a Live Market Tick Brokerage Platform | System design | ๐ Sep 05, 2026 | |
| Attentive | Design a Third-Party Data Pull Platform | System design | ๐ Sep 05, 2026 | |
| Edge | Design a Website Content Parsing Service | System design | ๐ Sep 05, 2026 | |
| Twilio | Design an Idempotent Multi-Source Event Store | System design | ๐ Sep 05, 2026 | |
| Roblox | Design Shared To-Do List Synchronization | System design | ๐ Sep 05, 2026 | |
| Tekion | Design an Inventory Stock Control Domain | Low-level design | ๐ Sep 05, 2026 | |
| Rippling | Maximum Currency Conversion Along a Simple Path | Coding | ๐ Sep 05, 2026 | |
| FlexTrade | Best Time to Buy and Sell Stock | Coding | ๐ Sep 04, 2026 | |
| ByteDance | Restore Addresses with K Segments | Coding | ๐ Sep 04, 2026 | |
| Flowerbed Capacity Queries | Coding | ๐ Sep 04, 2026 | ||
| Microsoft | Maximum Decrypted Score | Coding | ๐ Sep 04, 2026 | |
| Microsoft | Minimum Team Size From Every Start | Coding | ๐ Sep 04, 2026 | |
| Min Absolute Sum | Coding | ๐ Sep 04, 2026 | ||
| World Wide Technology | Design a Prompt-Aware RAG Query Service | System design | ๐ Sep 04, 2026 | |
| The Walt Disney Company | Design an Authentication Session Lifecycle | Low-level design | ๐ Sep 04, 2026 | |
| Snowflake | Minimum Clicks Between Wiki Pages | Coding | ๐ Sep 04, 2026 | |
| Commure | Design Monthly Stream Royalties and Artist Payouts | System design | ๐ Sep 04, 2026 | |
| David AI | Design an Audio AI Processing Backend | System design | ๐ Sep 04, 2026 | |
| Abridge | Clone a Connected Graph | Coding | ๐ Sep 03, 2026 | |
| Astrotalk | Design a Cached Astrologer Listing Service | System design | ๐ Sep 03, 2026 | |
| Verkada | Design a Live A-or-B Survey | System design | ๐ Sep 03, 2026 | |
| eBay | Design a Shopping Search Bar | System design | ๐ Sep 03, 2026 | |
| Astrotalk | Design an Idempotent Action API | System design | ๐ Sep 03, 2026 | |
| Oracle | Design GPU Host Health Monitoring and Repair | System design | ๐ Sep 03, 2026 | |
| SentinelOne | Design and Implement a Concurrent Web Crawler Library | Low-level design | ๐ Sep 03, 2026 | |
| Amazon | Design and Implement a Train Route Fare Calculator | Low-level design | ๐ Sep 03, 2026 | |
| Amazon | Design and Implement a Sliding Window Maximum API | Low-level design | ๐ Sep 03, 2026 | |
| Roblox | Rate Limiter Sliding Window With Per-Entity Limits | Coding | ๐ Sep 02, 2026 | |
| DoorDash | Build a Dasher Payout Service | AI coding | ๐ Sep 02, 2026 | |
| Amazon | Repair Blog Post Creation | AI coding | ๐ Sep 02, 2026 | |
| Rivian | Design Autonomous-Vehicle Sensor Health and Diagnostics | System design | ๐ Sep 02, 2026 | |
| DRW | Shortest Path Around Rectangular Obstacles | Coding | ๐ Sep 02, 2026 | |
| Amazon | Minimum Adjacent Swaps to Group Binary Values | Coding | ๐ Sep 02, 2026 | |
| ByteDance | Weighted Round-Robin Seller Task Scheduler | Coding | ๐ Sep 02, 2026 | |
| Most-Frequent Next-Word Predictor | Coding | ๐ Sep 02, 2026 | ||
| Shortest Path Node Count Avoiding Broken Nodes | Coding | ๐ Sep 02, 2026 | ||
| Billing Log with Undo and Redo | Coding | ๐ Sep 02, 2026 | ||
| Salesforce | Implement Merge Sort | Coding | ๐ Sep 02, 2026 | |
| Salesforce | Sorted Doubly Linked List to Balanced BST In Place | Coding | ๐ Sep 02, 2026 | |
| Salesforce | Top K Frequent Elements After Each Stream Update | Coding | ๐ Sep 02, 2026 | |
| Uber | Find File Paths in a Directory Tree | Coding | ๐ Sep 02, 2026 | |
| Verkada | Common Camera Motion Intervals | Coding | ๐ Sep 02, 2026 | |
| ByteDance | Alien Dictionary | Coding | ๐ Sep 02, 2026 | |
| ByteDance | Minimum Removals for Non-Overlapping Intervals | Coding | ๐ Sep 02, 2026 | |
| Airbnb | Progressive Banking System with Cashback | Coding | ๐ Sep 01, 2026 | |
| Goldman Sachs | Maximize Element Frequency | Coding | ๐ Sep 01, 2026 | |
| Goldman Sachs | Notification Deduplication Window | Coding | ๐ Sep 01, 2026 | |
| Amazon | Maximum Frequency Stack | Coding | ๐ Sep 01, 2026 | |
| Goldman Sachs | The Maze | Coding | ๐ Sep 01, 2026 | |
| JPMorgan Chase | Top K Frequent Values Across Key-Partitioned Shards | Coding | ๐ Sep 01, 2026 | |
| Mercor | Shortest Path in a Grid with Obstacles Elimination | Coding | ๐ Sep 01, 2026 | |
| Microsoft | Arithmetic Expression Evaluator | Coding | ๐ Sep 01, 2026 | |
| Microsoft | Employee Hierarchy Cycle and Depth Analysis | Coding | ๐ Sep 01, 2026 | |
| Microsoft | Most Visited String Sectors | Coding | ๐ Sep 01, 2026 | |
| IMC Trading | Design Heterogeneous Compute Workload Allocation | System design | ๐ Sep 01, 2026 | |
| Design a Bookshelf with Reading Progress | Low-level design | ๐ Sep 01, 2026 | ||
| Akuna Capital | Minimum Swaps | Coding | ๐ Sep 01, 2026 | |
| Akuna Capital | Minimum Absolute Difference Pairs | Coding | ๐ Sep 01, 2026 | |
| Filesystem Entity Total Size | Coding | ๐ Sep 01, 2026 | ||
| Largest Number | Coding | ๐ Sep 01, 2026 | ||
| Snap Inc. | Most Stones Removed with Same Row or Column | Coding | ๐ Sep 01, 2026 | |
| Repeated Shortest Word Distance Queries | Coding | ๐ Sep 01, 2026 | ||
| Snowflake | Design an Interactive SQL Notebook | System design | ๐ Aug 31, 2026 | |
| Nubank | Design an Online Coding Competition Platform | System design | ๐ Aug 31, 2026 | |
| Mercor | Design a Project-to-Contractor Matching Platform | System design | ๐ Aug 31, 2026 | |
| OpenAI | Design a Multi-Channel Bot Notification Service | Low-level design | ๐ Aug 31, 2026 | |
| Visa | Collect Branches for a Bird Nest | Coding | ๐ Aug 31, 2026 | |
| Visa | Count Reverse-Digit Pairs | Coding | ๐ Aug 31, 2026 | |
| Salesforce | Diameter of an Acyclic Undirected Graph | Coding | ๐ Aug 31, 2026 | |
| Scale AI | Four-Player Trick-Taking Card Game Simulation | Coding | ๐ Aug 31, 2026 | |
| Snowflake | Design In-Memory File System | Coding | ๐ Aug 31, 2026 | |
| MongoDB | Recursive Nested JSON Key Search | Coding | ๐ Aug 31, 2026 | |
| Salesforce | Path Sum | Coding | ๐ Aug 31, 2026 | |
| Earliest Time of Full Connection | Coding | ๐ Aug 31, 2026 | ||
| Parent-Child Deletion Order | Coding | ๐ Aug 31, 2026 | ||
| Lyft | Rotten Oranges / Grid Infection BFS | Coding | ๐ Aug 31, 2026 | |
| Amazon | Linked-List Queue with Delete and Deduplication | Coding | ๐ Aug 31, 2026 | |
| Databricks | Minimize Commute | Coding | ๐ Aug 31, 2026 | |
| Maximize Two Endpoint Values | Coding | ๐ Aug 31, 2026 | ||
| Expression Add Operators | Coding | ๐ Aug 31, 2026 | ||
| Nested JSON Schema Validator | Coding | ๐ Aug 31, 2026 | ||
| Amazon | Design and Implement a Streaming Median API | Low-level design | ๐ Aug 31, 2026 | |
| Stripe | Design an Idempotent Ledger Service | System design | ๐ Aug 30, 2026 | |
| ByteDance | Design a Top Songs by Country Leaderboard | System design | ๐ Aug 30, 2026 | |
| Airwallex | Design an Asynchronous File Analysis and Reporting System | System design | ๐ Aug 30, 2026 | |
| Anthropic | Design Opaque-GPU Inference Capacity | System design | ๐ Aug 30, 2026 | |
| Verkada | Design a Camera Heartbeat Health Dashboard | System design | ๐ Aug 30, 2026 | |
| Verkada | Design a Distributed Matrix Transpose Service | System design | ๐ Aug 30, 2026 | |
| Matroid | Count Good Tuples | Coding | ๐ Aug 30, 2026 | |
| Matroid | Validate 3x3 Digit Windows | Coding | ๐ Aug 30, 2026 | |
| Matroid | Diagonal Robot Path Sum | Coding | ๐ Aug 30, 2026 | |
| Matroid | Count House Segments After Destruction | Coding | ๐ Aug 30, 2026 | |
| Wolverine Trading | Market Share Ticker with Imbalance | SQL | ๐ Aug 30, 2026 | |
| Wolverine Trading | Hedges Outperforming Their Trades | SQL | ๐ Aug 30, 2026 | |
| Rippling | Stateful Log Transform and Search | Coding | ๐ Aug 30, 2026 | |
| Hadrian | Process Graph Rule Validation | Coding | ๐ Aug 30, 2026 | |
| Capital One | Queue Check-in Simulation with Capacity Limit | Coding | ๐ Aug 30, 2026 | |
| Capital One | Dynamic Wall Building and Range Query | Coding | ๐ Aug 30, 2026 | |
| Capital One | Count Key Changes | Coding | ๐ Aug 30, 2026 | |
| Capital One | Longest Common Prefix of Number Pairs | Coding | ๐ Aug 30, 2026 | |
| Microsoft | Maximum String Operations | Coding | ๐ Aug 29, 2026 | |
| Microsoft | Authentication System | Coding | ๐ Aug 29, 2026 | |
| Capital One | Product of Digits Minus Sum | Coding | ๐ Aug 29, 2026 | |
| Capital One | Minimize Expression Value with Parentheses | Coding | ๐ Aug 29, 2026 | |
| Capital One | Leftmost Memory Block Allocator | Coding | ๐ Aug 29, 2026 | |
| Capital One | Optimal Lamp Coordinate | Coding | ๐ Aug 29, 2026 | |
| Roblox | Event ID Check Completion Times | Coding | ๐ Aug 29, 2026 | |
| Roblox | Count House Segments After Destruction | Coding | ๐ Aug 29, 2026 | |
| Design a Massive Geospatial Data Visualization Platform | System design | ๐ Aug 29, 2026 | ||
| Design an Embeddable Streaming Chat Agent | System design | ๐ Aug 29, 2026 | ||
| OpenAI | Power Plant Operations Platform | System design | ๐ Aug 29, 2026 | |
| Uber | Design and Implement Ride Dispatch and Trip Lifecycle | Low-level design | ๐ Aug 29, 2026 | |
| ClearTax | Design a Railway Search and Booking Platform | System design | ๐ Aug 29, 2026 | |
| ClearTax / Motive / Meesho | Design a Movie Ticket Booking System | Low-level design | ๐ Aug 29, 2026 | |
| Goldman Sachs | Palindrome Counter | Coding | ๐ Aug 29, 2026 | |
| WeRide | Drawing Edge | Coding | ๐ Aug 29, 2026 | |
| WeRide | Paint the Ceiling | Coding | ๐ Aug 29, 2026 | |
| WeRide | Unequal Block Structure | Coding | ๐ Aug 29, 2026 | |
| Airbnb | In-Memory Database | Coding | ๐ Aug 28, 2026 | |
| Snowflake / Amperity / Fivetran | Design a Unified SaaS Analytics Platform | System design | ๐ Aug 28, 2026 | |
| NVIDIA | Autonomous-Driving Camera Perception Pipeline | System design | ๐ Aug 28, 2026 | |
| Oracle | Design a Software Load Balancer | System design | ๐ Aug 28, 2026 | |
| Tesla | Design an E-commerce Order Fulfillment System | System design | ๐ Aug 28, 2026 | |
| Oracle | Design and Implement an Active-Passive Key-Value Store | Low-level design | ๐ Aug 28, 2026 | |
| Amazon | Minimum Grid Inconvenience | Coding | ๐ Aug 28, 2026 | |
| Indeed | Redesign a Production Spam Classifier | System design | ๐ Aug 28, 2026 | |
| IMC | Grid Paths with Override Passes | Coding | ๐ Aug 28, 2026 | |
| Walmart | Minimum Stress Path | Coding | ๐ Aug 27, 2026 | |
| Microsoft | Roll the String | Coding | ๐ Aug 27, 2026 | |
| Microsoft | Minimum Length Good Subarray | Coding | ๐ Aug 27, 2026 | |
| Design a Job Listing Freshness Platform | System design | ๐ Aug 27, 2026 | ||
| Amazon | Repair Event Listing Filters, Pagination, and Caching | AI coding | ๐ Aug 27, 2026 | |
| Maven Securities | Prime Factor Visitation | Coding | ๐ Aug 26, 2026 | |
| Maven Securities | Resource Allocation | Coding | ๐ Aug 26, 2026 | |
| TikTok | Event ID Check Completion Times | Coding | ๐ Aug 26, 2026 | |
| TikTok | Find Sum Pairs (for mle also :) | Coding | ๐ Aug 26, 2026 | |
| Superhuman / Grammarly | Design an Ephemeral Messaging Service | System design | ๐ Aug 26, 2026 | |
| Amazon | Customer Support Chat Platform | System design | ๐ Aug 26, 2026 | |
| ElevenLabs | AI-Assisted Commerce Platform | System design | ๐ Aug 26, 2026 | |
| ByteDance | Match Consecutive Word Boundaries (for mle also :) | Coding | ๐ Aug 25, 2026 | |
| ByteDance | Minimize Expression Value with Parentheses (for mle also :) | Coding | ๐ Aug 25, 2026 | |
| ByteDance | Leftmost Memory Block Allocator (for mle also :) | Coding | ๐ Aug 25, 2026 | |
| ByteDance | Find Sum Pairs (for mle also :) | Coding | ๐ Aug 25, 2026 | |
| Netflix / Google | Design a Grounded Recommendation Chatbot | System design | ๐ Aug 25, 2026 | |
| Rippling / Apple / Oracle / Confluent | Design a Centralized Log Ingestion and Search Platform | System design | ๐ Aug 25, 2026 | |
| Tekion | Design a Continuous Table Merge into NoSQL | System design | ๐ Aug 25, 2026 | |
| Apple | Design a Multi-Version Configuration Service | System design | ๐ Aug 25, 2026 | |
| Microsoft | Design a Ticket Context and System Status Platform | System design | ๐ Aug 25, 2026 | |
| Waymo | Design an Autonomous-Vehicle Cloud Command System | System design | ๐ Aug 25, 2026 | |
| Cerebras | Dense Vector Dot Product | Coding | ๐ Aug 24, 2026 | |
| IBM | Expiring Authentication Token Manager | Coding | ๐ Aug 24, 2026 | |
| Goldman Sachs | Maximum Ones After K Operations | Coding | ๐ Aug 24, 2026 | |
| TikTok | Repeated Grouped Digit Sum | Coding | ๐ Aug 24, 2026 | |
| Amazon / Microsoft | Design a Marketplace Product Search Service | System design | ๐ Aug 24, 2026 | |
| JP Morgan Chase | Design a Multimodal RAG Retrieval Platform | System design | ๐ Aug 24, 2026 | |
| JP Morgan Chase | Design a Region-Aware User Record Store | System design | ๐ Aug 24, 2026 | |
| JP Morgan Chase | Design a Reliable Endpoint File Transfer Service | System design | ๐ Aug 24, 2026 | |
| JP Morgan Chase | Design a Role-Based Token Authorization Platform | System design | ๐ Aug 24, 2026 | |
| Amazon | Design a Seller Product-Image Upload Service | System design | ๐ Aug 24, 2026 | |
| Visa | Design an E-Commerce Top-Spender Query | System design | ๐ Aug 24, 2026 | |
| Amazon | Design an Online Coding Practice Platform | System design | ๐ Aug 24, 2026 | |
| Goldman Sachs | Repair the Held-Ticket Confirmation Lifecycle | AI coding | ๐ Aug 24, 2026 | |
| Alpaca | Return Distinct Elements | Coding | ๐ Aug 23, 2026 | |
| Alpaca | Make a Sorted Array Unique In Place | Coding | ๐ Aug 23, 2026 | |
| Citadel | Minimum Changes for Palindromic Blocks | Coding | ๐ Aug 23, 2026 | |
| Assign Locker | Coding | ๐ Aug 23, 2026 | ||
| Microsoft | Minimum Fuel Cost Between Cities | Coding | ๐ Aug 23, 2026 | |
| Microsoft | Design a Multi-Tenant One-Time Password Service | System design | ๐ Aug 23, 2026 | |
| Salesforce | Design a Real-Time Direct Messaging System | System design | ๐ Aug 23, 2026 | |
| Oracle | Design a Scheduled Fan-Out Delivery Platform | System design | ๐ Aug 23, 2026 | |
| Microsoft | Design a Web Crawler and Inverted Index | System design | ๐ Aug 23, 2026 | |
| Walmart / Crowdstrike | Design Multi-Cloud Blob Malware Scanning | System design | ๐ Aug 23, 2026 | |
| Salesforce | Design a Connect Four Game | Low-level design | ๐ Aug 23, 2026 | |
| Walmart | Design a Job Marketplace Domain | Low-level design | ๐ Aug 23, 2026 | |
| Tekion | Design a Workflow Orchestrator Domain | Low-level design | ๐ Aug 23, 2026 | |
| Barclays | Allocate Workers for a Production Ratio | Coding | ๐ Aug 22, 2026 | |
| Anthropic | Cloud Storage System | Coding | ๐ Aug 22, 2026 | |
| Uber | Design a Price Movement Alert Platform | System design | ๐ Aug 22, 2026 | |
| Citadel / Goldman Sachs | Design a Course Registration Platform | System design | ๐ Aug 22, 2026 | |
| Design a Rolling Shared-Article Leaderboard | System design | ๐ Aug 22, 2026 | ||
| Directed Graph Reachability Queries | Coding | ๐ Aug 21, 2026 | ||
| Phone Spam Report Counter | Coding | ๐ Aug 21, 2026 | ||
| Minimize the Longest Hike Between Rest Stops | Coding | ๐ Aug 21, 2026 | ||
| Netflix | Undo and Redo Command History | Coding | ๐ Aug 21, 2026 | |
| Count Ordered Combination Sums with Negative Values | Coding | ๐ Aug 21, 2026 | ||
| Count Ordered Combination Sums | Coding | ๐ Aug 21, 2026 | ||
| Fixed-Length Combination Sum | Coding | ๐ Aug 21, 2026 | ||
| Combination Sum with Single-Use Values | Coding | ๐ Aug 21, 2026 | ||
| Combination Sum with Reusable Values | Coding | ๐ Aug 21, 2026 | ||
| Apple | Design Hash Map | Coding | ๐ Aug 21, 2026 | |
| ByteDance | Search in a Rotated Sorted Array with Duplicates | Coding | ๐ Aug 21, 2026 | |
| OpenAI | One-Nearest-Neighbor Classification | Coding | ๐ Aug 21, 2026 | |
| OpenAI | Plant Infection Simulation, Part 4: Death Countdown | Coding | ๐ Aug 21, 2026 | |
| Illumio | Least Recently Used Cache | Coding | ๐ Aug 21, 2026 | |
| Minimum Racks for Server Resources | Coding | ๐ Aug 21, 2026 | ||
| Meta | First Common Ancestor with Parent Pointers | Coding | ๐ Aug 21, 2026 | |
| Meta | Minimum Removal for Balanced Parentheses | Coding | ๐ Aug 21, 2026 | |
| Count Prefix Paths in a Character Graph | Coding | ๐ Aug 21, 2026 | ||
| Airbnb | Cloud Storage with User Backup and Restore | Coding | ๐ Aug 21, 2026 | |
| Anthropic | Task Management System | Coding | ๐ Aug 21, 2026 | |
| General Motors | Per-Client Sliding-Window Rate Limiter | Coding | ๐ Aug 21, 2026 | |
| Netflix | Timed Cache with Sidecar Cleanup | Coding | ๐ Aug 21, 2026 | |
| ByteDance | Count Numbers with an Even Digit Count | Coding | ๐ Aug 21, 2026 | |
| ByteDance | Sorted Absolute-Difference Sums Across Cyclic Shifts | Coding | ๐ Aug 21, 2026 | |
| ByteDance | Sort Concentric Matrix Borders Clockwise | Coding | ๐ Aug 21, 2026 | |
| ByteDance | Count House Segments After Sequential Destruction | Coding | ๐ Aug 21, 2026 | |
| Quince | Minimum Sprinklers to Cover an Interval | Coding | ๐ Aug 21, 2026 | |
| Quince | Check a Repeated String as a Subsequence | Coding | ๐ Aug 21, 2026 | |
| Temu | Merge Two Sorted Collections Without Duplicates | Coding | ๐ Aug 21, 2026 | |
| Anthropic | Design a Model-Weight Deployment Platform | System design | ๐ Aug 21, 2026 | |
| ByteDance | Cache Avalanche Resilience | System design | ๐ Aug 21, 2026 | |
| ByteDance | Cache-Aside Consistency Recovery | System design | ๐ Aug 21, 2026 | |
| Netflix | Design a Competitive Ad Exclusion Service | System design | ๐ Aug 21, 2026 | |
| General Motors | Design a Composable AI Function Platform | System design | ๐ Aug 21, 2026 | |
| Cursor | Hash-Tree Client/Server Synchronization | System design | ๐ Aug 21, 2026 | |
| ByteDance | Relational Query Index Design | System design | ๐ Aug 21, 2026 | |
| ByteDance | SQL Index Eligibility Analysis | System design | ๐ Aug 21, 2026 | |
| IBM | Drawing Edge | Coding | ๐ Aug 20, 2026 | |
| IBM | Increasing-Value Triplets Under a Threshold | Coding | ๐ Aug 20, 2026 | |
| Meta | Maximum Unique-Character Word Subset | Coding | ๐ Aug 20, 2026 | |
| Meta | Validate a Palindrome After Limited Deletions | Coding | ๐ Aug 20, 2026 | |
| Meta | Minimum-Sum Root-to-Leaf Path | Coding | ๐ Aug 20, 2026 | |
| Nuro | Schedule Buffered Video Playback | Coding | ๐ Aug 20, 2026 | |
| Nuro | Reveal a Minesweeper Region | Coding | ๐ Aug 20, 2026 | |
| Meta | Design a Boolean Status Search Index | System design | ๐ Aug 20, 2026 | |
| Amazon | Design and Implement Movie Theater Ticket Pricing | Low-level design | ๐ Aug 20, 2026 | |
| Oracle | Design a Healthcare Data Ingestion Pipeline | System design | ๐ Aug 19, 2026 | |
| eBay | Design a Top-Selling Items and Categories Dashboard | System design | ๐ Aug 19, 2026 | |
| eBay | Design a Workplace Lunch Ordering Platform | System design | ๐ Aug 19, 2026 | |
| Micro1 | Design an In-Memory Read-Through Cache | Low-level design | ๐ Aug 19, 2026 | |
| Meta | Build an In-Memory Cloud Storage System | AI coding | ๐ Aug 19, 2026 | |
| IBM | Count Invalid Log Groups | Coding | ๐ Aug 18, 2026 | |
| IBM | Count Paginated Medical Records in a Range | Coding | ๐ Aug 18, 2026 | |
| Design an Asynchronous Bulk Record Update Service | System design | ๐ Aug 18, 2026 | ||
| Axon | Design a Nearest-Timestamp Device Status Service | System design | ๐ Aug 17, 2026 | |
| Uber Freight | Design a Rolling Restaurant Analytics Dashboard | System design | ๐ Aug 17, 2026 | |
| Capital One | Highest Version B Viewing Week | SQL | ๐ Aug 17, 2026 | |
| Airtable / Meta / Microsoft | Design a Backend Search Engine | System design | Aug 16, 2026 | |
| Zoox / Uber | Design a Nearby Autonomous Vehicle Search Service | System design | Aug 16, 2026 | |
| Amazon | Design a Multi-Branch Library Management System | System design | Aug 16, 2026 | |
| Design a Ranked Hybrid Social Feed | System design | Aug 16, 2026 | ||
| Microsoft | Design a Distributed Expiring LRU Cache | System design | Aug 16, 2026 | |
| Salesforce | Design a Multi-Tenant Order-Statistics Index | System design | Aug 16, 2026 | |
| DoorDash | Design a Sliding-Window Restaurant Leaderboard | System design | Aug 16, 2026 | |
| Adobe | Design a Versioned Localization Resource Platform | System design | Aug 16, 2026 | |
| Salesforce | Design an Enterprise Multi-Tenant Messaging Platform | System design | Aug 16, 2026 | |
| Adobe | Design an Extensible Tree Traversal Toolkit | System design | Aug 16, 2026 | |
| Apple | Design Cross-Device Wallpaper Synchronization | System design | Aug 16, 2026 | |
| Snowflake | Design Calendar Client State and Recurrence | System design | Aug 15, 2026 | |
| Microsoft | Desktop Notification Center | Low-level design | Aug 15, 2026 | |
| Microsoft | Design Grounded Local Sports Recommendations | System design | Aug 15, 2026 | |
| Giga | Design a Browser-Automated Customer Support Agent | System design | Aug 14, 2026 | |
| Rippling / Amazon | Design an Event Ingestion Platform | System design | Aug 14, 2026 | |
| Spotify | Design a Personalized Session Playlist Ranking System | System design | Aug 14, 2026 | |
| Wells Fargo | Cursor-Paginated Records Service | System design | Aug 14, 2026 | |
| Rippling | Delivery Cost Tracker | Coding | Aug 14, 2026 | |
| Adobe | Count Parent Nodes With a Target Sum | Coding | Aug 14, 2026 | |
| Adobe | Largest Binary Number by Concatenation | Coding | Aug 14, 2026 | |
| Anthropic | Design Peer-to-Peer Model Distribution | System design | Aug 13, 2026 | |
| OpenAI | Design a Distributed Crossword Solver | System design | Aug 13, 2026 | |
| Meta | Design a Multimodal Public-Content Safety Platform | System design | Aug 13, 2026 | |
| Databricks | Online Bookseller Platform | System design | Aug 13, 2026 | |
| Agoda | Resilient Hotel Search Frontend | System design | Aug 13, 2026 | |
| IMC | Rock Jumping | Coding | Aug 13, 2026 | |
| IMC | Stack Batch Removal | Coding | Aug 13, 2026 | |
| Anthropic | Inference Engine (Fellow Program :D | AI coding | Aug 12, 2026 | |
| Anthropic | Debug Extremely Randomized Trees (Fellow Program :) | AI coding | Aug 12, 2026 | |
| Figma | Design Comments for a Collaborative Canvas | System design | Aug 12, 2026 | |
| Goldman Sachs | Design a Live-Stream Chat System | System design | Aug 12, 2026 | |
| Coinbase / Goldman Sachs | Design a Brokerage Order Processing System | System design | Aug 12, 2026 | |
| Mercor | Design a Unique Username Registration System | System design | Aug 12, 2026 | |
| Shopify | Design an Extensible Text Editor | Low-level design | Aug 12, 2026 | |
| Amazon | Design Smart-Device Feature Announcement Delivery | System design | Aug 12, 2026 | |
| Amazon | Design a Multi-Stage Audio Buffer Pipeline | Low-level design | Aug 12, 2026 | |
| Apple | Design a Mobile Application Event Collection API | System design | Aug 11, 2026 | |
| Rippling / Retool | Design a Room-Type Hotel Booking System | System design | Aug 11, 2026 | |
| Databricks | Design an LLM Content Safety Service | System design | Aug 11, 2026 | |
| Microsoft / Bloomberg LP | Design a Library Circulation System | Low-level design | Aug 11, 2026 | |
| Capital One | Highest-Spend Advertisement | SQL | Aug 11, 2026 | |
| Visa | Maximum Server Processing Time | Coding | Aug 11, 2026 | |
| Visa | Binary Sorting Rounds After Flips | Coding | Aug 11, 2026 | |
| Amazon / Oracle | Design a Netflix-Style Streaming Platform | System design | Aug 10, 2026 | |
| Uber | Design a Driver Review Leaderboard | System design | Aug 10, 2026 | |
| Oracle | Design a Remote Browser Isolation Service | System design | Aug 10, 2026 | |
| Pinterest / Bloomberg LP | Design a Blackjack Table Game | Low-level design | Aug 10, 2026 | |
| Spotify | Design a Weekly User Activity Prediction System | System design | Aug 10, 2026 | |
| Anthropic | Design Production ML Serving Observability | System design | Aug 10, 2026 | |
| Amazon | Design Group Purchase Contributions and Settlement | System design | Aug 10, 2026 | |
| Abridge | Streaming Transcription Service | System design | Aug 10, 2026 | |
| Adobe | Hall of Shifting Tiles | Coding | Aug 09, 2026 | |
| Apple | Design an On-Prem Media Transfer for Cloud GPU Training | System design | Aug 09, 2026 | |
| IBM | Maximize Consecutive XOR | Coding | Aug 09, 2026 | |
| IBM | Count Digit Holes | Coding | Aug 09, 2026 | |
| Adobe | Design Infinite Scroll for Mutable Data | Low-level design | Aug 09, 2026 | |
| Adobe | Design a Promotion Display Decision Engine | Low-level design | Aug 09, 2026 | |
| Adobe | Minimum Numeric Code Transformation | Coding | Aug 09, 2026 | |
| Adobe | K-th Ancestor Subtree Preorder Query | Coding | Aug 09, 2026 | |
| Adobe | Number-Character Bijective Mapping | Coding | Aug 09, 2026 | |
| Adobe | Trapped Characters in a Grid | Coding | Aug 09, 2026 | |
| Zoox | Design a Real-Time Fleet Location Display | System design | Aug 07, 2026 | |
| Figma | Design Trending Design Files | System design | Aug 07, 2026 | |
| Bloomberg LP | Merge Intervals | Coding | Aug 07, 2026 | |
| Bloomberg LP | Valid Palindrome II | Coding | Aug 07, 2026 | |
| Anthropic | Repair an Agent and Reduce Its Turn Count | AI coding | Aug 06, 2026 | |
| Rippling | Design a Frontend News Feed with Offline Virtualization | System design | Aug 06, 2026 | |
| Amazon | Design an ML Training and Deployment Platform | System design | Aug 06, 2026 | |
| Design Viral Comment Notification Aggregation | System design | Aug 06, 2026 | ||
| Infosys | Design Offline-First Document Autosave and Synchronization | System design | Aug 06, 2026 | |
| Otter.ai | Design a Meeting Bot Allocation and Status Platform | System design | Aug 06, 2026 | |
| Headway | Design Vacation Rental Listing Search | System design | Aug 06, 2026 | |
| Headway | Fixed-Window Rate Limiter Middleware | AI coding | Aug 06, 2026 | |
| Headway | Repair Insurance Eligibility Status Projection | AI coding | Aug 06, 2026 | |
| TikTok | Distribution Center Package Allocation | Coding | Aug 05, 2026 | |
| Netflix | Design Advertising Order Lifecycle Tracking | System design | Aug 05, 2026 | |
| Netflix | Design an Advertising Frequency-Capping Service | System design | Aug 05, 2026 | |
| TikTok | Concatenate Digit-wise Sums | Coding | Aug 05, 2026 | |
| TikTok | Count 2x2 Submatrices by Black Cells | Coding | Aug 05, 2026 | |
| TikTok | Count House Segments After Destruction | Coding | Aug 05, 2026 | |
| TikTok | Debugger Breakpoint Actions | Coding | Aug 05, 2026 | |
| TikTok | Find All Local Peaks | Coding | Aug 05, 2026 | |
| TikTok | Minimum Height Difference Between Distant Peaks | Coding | Aug 05, 2026 | |
| TikTok | Minimum Operations for Stepwise Structures | Coding | Aug 05, 2026 | |
| TikTok | Rating Level After Changes | Coding | Aug 05, 2026 | |
| TikTok | Space Station Shuttle Missions | Coding | Aug 05, 2026 | |
| Apple | Design a Multi-Device Photo Storage System | System design | Aug 05, 2026 | |
| JP Morgan Chase | Design a Fleet Insurance Registration Platform | System design | Aug 05, 2026 | |
| IMC | Weighted LFU Cache | Coding | Aug 05, 2026 | |
| TikTok | Count Case-Insensitive Triplets | Coding | Aug 04, 2026 | |
| TikTok | Linear Warehouse Drone Delivery | Coding | Aug 04, 2026 | |
| Figma | Design Access-Aware Design-File Retrieval and Ranking | System design | Aug 04, 2026 | |
| TikTok | Product Minus Sum of Digits | Coding | Aug 04, 2026 | |
| Adyen | Design a Campaign Milestone Visitor Reward | System design | Aug 04, 2026 | |
| IMC | Chain of Command | Coding | Aug 04, 2026 | |
| IMC | Choose Containers | Coding | Aug 04, 2026 | |
| HSBC | Minimum Satellite Data Transfer Iterations | Coding | Aug 03, 2026 | |
| HSBC | Organization Reputation After Employee Departures | Coding | Aug 03, 2026 | |
| DoorDash | Design a Downstream-Service Alert Notification System | System design | Aug 03, 2026 | |
| Anthropic | Design a Prompt Playground | System design | Aug 03, 2026 | |
| Amazon | Repair the Wallet Loan Marketplace | AI coding | Aug 03, 2026 | |
| Gusto | Design a Restaurant Staff Scheduling System | System design | Aug 03, 2026 | |
| HSBC | Remove Vowels from a String | Coding | Aug 03, 2026 | |
| Infosys | Count Valid A-B-C Sequences Under a Modulo-Four Rule | Coding | Aug 02, 2026 | |
| Infosys | Maximum Product of a Strictly Increasing Contiguous Subarray | Coding | Aug 02, 2026 | |
| Infosys | Minimum Cost to Assign Candidates to Two Cities | Coding | Aug 02, 2026 | |
| OpenAI | Design a Declarative Infrastructure Orchestrator | System design | Aug 02, 2026 | |
| Baseten | Build a Durable Single-Server Key-Value Store | AI coding | Aug 02, 2026 | |
| Baseten | Parallelize API Calls with a Thread Pool | AI coding | Aug 02, 2026 | |
| Asana | Design a Rectangular Jigsaw Puzzle | Low-level design | Aug 02, 2026 | |
| Decagon | Design a Multi-Tenant AI Gateway | System design | Aug 01, 2026 | |
| Scale AI | Design an Embedding and Classification API | System design | Aug 01, 2026 | |
| Apple | Design an Online Voting Service | System design | Aug 01, 2026 | |
| Scale AI | Build a CSV-to-JSON LLM Categorization Service | AI coding | Aug 01, 2026 | |
| Adobe | Minimum Snapshots for a Version Tree | Coding | Jul 31, 2026 | |
| Superhuman | Reverse a Singly Linked List | Coding | Jul 31, 2026 | |
| Superhuman | Recover a Tree from Preorder Depth Encoding | Coding | Jul 31, 2026 | |
| Superhuman | Deep Copy a Singly Linked List | Coding | Jul 31, 2026 | |
| Superhuman | Deep Copy a Random-Pointer List | Coding | Jul 31, 2026 | |
| Chicago Trading Company | Design a Pre-Trade Risk Checking System | System design | Jul 31, 2026 | |
| Plaid | Design an Embedded Pay-by-Bank Checkout | System design | Jul 31, 2026 | |
| OpenAI | Repair a Deployed Django Rate Limiter | AI coding | Jul 31, 2026 | |
| Microsoft | Maximum Score with Prime Jumps | Coding | Jul 30, 2026 | |
| Visa | Connected Groups | Coding | Jul 30, 2026 | |
| Visa | Perfect Substrings | Coding | Jul 30, 2026 | |
| Oracle | Alphabetically Maximum Substring | Coding | Jul 30, 2026 | |
| StackAdapt | Nested Recipe Inventory Manager | Coding | Jul 30, 2026 | |
| Snowflake | Distributed Tree Counting State Machine | Coding | Jul 30, 2026 | |
| Snowflake | Maximum Number of Events That Can Be Attended | Coding | Jul 30, 2026 | |
| Amazon | Single Element in a Sorted Array | Coding | Jul 30, 2026 | |
| eBay | K Smallest Elements from Sorted Arrays | Coding | Jul 30, 2026 | |
| eBay | Single-Pass Search in a Rotated Sorted Array | Coding | Jul 30, 2026 | |
| Opendoor | Finite Same-Origin Web Crawler | Coding | Jul 30, 2026 | |
| Oracle | Enumerate Right-and-Down Matrix Paths | Coding | Jul 30, 2026 | |
| Oracle | Maximize Movie Ratings Without Consecutive Skips | Coding | Jul 30, 2026 | |
| Databricks | Key-Value Store with Hit Counter | Coding | Jul 30, 2026 | |
| Oracle | Best Time to Buy and Sell Stock | Coding | Jul 30, 2026 | |
| IBM | String-Pair Frequency Similarity | Coding | Jul 30, 2026 | |
| Pinterest / Amazon / Zoom / Goldman Sachs | Design a Following News Feed Service | System design | Jul 30, 2026 | |
| Opendoor | Map-Based Home Search Backend | System design | Jul 30, 2026 | |
| Databricks / Highspot | Music Playlist System | System design | Jul 30, 2026 | |
| Susquehanna International Group (SIG) | Design a Cash Register with Inventory and Profit Tracking | Low-level design | Jul 30, 2026 | |
| Amazon | Design a Database Partition Split-and-Merge Manager | Low-level design | Jul 30, 2026 | |
| Walmart | Design a Marketplace Product Catalog Platform | System design | Jul 30, 2026 | |
| Amazon | Design and Implement a Streaming Log Handler | Low-level design | Jul 30, 2026 | |
| DoorDash | Design a Three-Day Charity Event System | System design | Jul 30, 2026 | |
| Mercury Insurance | Build a Python CRUD API | AI coding | Jul 30, 2026 | |
| Linked List Cycle Entry Node | Coding | Jul 29, 2026 | ||
| Cognitiv | Word Search | Coding | Jul 29, 2026 | |
| Chatter Message Window | Coding | Jul 29, 2026 | ||
| Amazon | Count the Number of Complete Components | Coding | Jul 29, 2026 | |
| Amazon | Cousins in Binary Tree II | Coding | Jul 29, 2026 | |
| Squarepoint | Evaluating Circuit Expressions | Coding | Jul 29, 2026 | |
| Rippling | Filter and Sort Scheduled Tasks | Coding | Jul 29, 2026 | |
| Longest Subarray with Sum at Most K | Coding | Jul 29, 2026 | ||
| Maximum Sum Path Between Two Leaf Nodes | Coding | Jul 29, 2026 | ||
| Amazon | Minimum Operations to Make an Array Continuous | Coding | Jul 29, 2026 | |
| Netflix | Movie Billboard Rotation | Coding | Jul 29, 2026 | |
| Airbnb | Recipe Management System | Coding | Jul 29, 2026 | |
| Amazon | Vertical Order Traversal of a Binary Tree | Coding | Jul 29, 2026 | |
| Databricks | Bookstore Batch Book-Price API | System design | Jul 29, 2026 | |
| Rippling | Design an Exact-Room Hotel Reservation System | System design | Jul 29, 2026 | |
| Amazon | Design Offline Reading-Progress Synchronization | System design | Jul 29, 2026 | |
| Databricks | WAL-Backed Batched Log-Writing System | System design | Jul 29, 2026 | |
| Databricks / ZipRecruiter | Design a Locking Key-Value Store with Batch Writes | Low-level design | Jul 29, 2026 | |
| Databricks | Design a WAL-Backed Batch Log Writer | Low-level design | Jul 29, 2026 | |
| Bilt Rewards | Configurable Reward Points Service | System design | Jul 29, 2026 | |
| Remitly | IP Address Filtering Service | System design | Jul 29, 2026 | |
| Harness | Streaming Ingredient Dishes | Coding | Jul 28, 2026 | |
| Oracle | Add One to a Number Represented as Digits | Coding | Jul 28, 2026 | |
| Oracle | Top K Frequent Elements with Larger-Value Tie Break | Coding | Jul 28, 2026 | |
| Virtu Financial | Profit Analysis | Coding | Jul 28, 2026 | |
| Virtu Financial | Banking Transaction Exceptions | Coding | Jul 28, 2026 | |
| Virtu Financial | FIX Message Reconciliation | Coding | Jul 28, 2026 | |
| Amazon | HTTP Request Redirection | Coding | Jul 28, 2026 | |
| Split a Log Outside Quotes | Coding | Jul 28, 2026 | ||
| Stripe | Group Linked Merchant Records | Coding | Jul 28, 2026 | |
| Apple | Insert Interval | Coding | Jul 28, 2026 | |
| Decode String | Coding | Jul 28, 2026 | ||
| Lyft | Minimum Workers with Job Assignments | Coding | Jul 28, 2026 | |
| Databricks | Blocking Keyed Cache with Waiting Readers | Coding | Jul 28, 2026 | |
| Phone Keypad Letter Combinations | Coding | Jul 28, 2026 | ||
| Count Prefix Matches in a Sorted Array | Coding | Jul 28, 2026 | ||
| Uber | Minimum Refueling Stops | Coding | Jul 28, 2026 | |
| OpenAI | Segmented Durable Key-Value Store | Coding | Jul 28, 2026 | |
| Cresta | Particle Moves to Target | Coding | Jul 28, 2026 | |
| Cresta | Top Three Companies by Profit | Coding | Jul 28, 2026 | |
| Cresta | Rightward Bacteria Consumption | Coding | Jul 28, 2026 | |
| Distributed Quoted-Log Tokenization | System design | Jul 28, 2026 | ||
| Lyft | Donation Platform | System design | Jul 28, 2026 | |
| Uber | Rolling Stock Price Alert System | System design | Jul 28, 2026 | |
| Bloomberg LP | Refactor a Cache for Pluggable Eviction Policies | Low-level design | Jul 28, 2026 | |
| Wells Fargo | Longest Subsequence That Is a Substring | Coding | Jul 28, 2026 | |
| Wells Fargo | Overloaded Game Account Inventories | SQL | Jul 28, 2026 | |
| Spotnana | Optimal Card Game Score | Coding | Jul 27, 2026 | |
| Zomato / Eternal | Maximum Production Within Power | Coding | Jul 27, 2026 | |
| Zomato / Eternal | Rearrange Songs by Author | Coding | Jul 27, 2026 | |
| Kikoff | JSON Identity Verification | Coding | Jul 27, 2026 | |
| The Allen Institute for AI | Streaming Step Progress Hierarchy | Coding | Jul 27, 2026 | |
| Airbnb | Parcel Event Tracking | Coding | Jul 27, 2026 | |
| Apple | Group Transitive String Aliases | Coding | Jul 27, 2026 | |
| Nooks | Majority Labels over Audio Intervals | Coding | Jul 27, 2026 | |
| Coinbase | In-Memory Database | Coding | Jul 27, 2026 | |
| Shopify | Deterministic Secret Santa Assignment | Coding | Jul 27, 2026 | |
| OpenAI | Durable String Key-Value Store | Coding | Jul 27, 2026 | |
| Confluent | Match a Variadic Function Signature | Coding | Jul 27, 2026 | |
| Ad Score Scheduler With Delay | Coding | Jul 27, 2026 | ||
| Alternating-Color Binary Tree Roots | Coding | Jul 27, 2026 | ||
| Spotnana | Minimize Maximum Pilot Workload | Coding | Jul 27, 2026 | |
| Amazon | Resolve Task Dependencies | Coding | Jul 27, 2026 | |
| Optiver | Design a News Subscription Processing Engine | System design | Jul 27, 2026 | |
| Brex | Design a Peer-to-Peer Money Transfer System | System design | Jul 27, 2026 | |
| Distyl AI | Design an Iterative Compound-LLM Defense Generator | System design | Jul 27, 2026 | |
| Hudson River Trading | Design Shared NFS Read Acceleration | System design | Jul 27, 2026 | |
| Coinbase / Airbnb | In-Memory Database | AI coding | Jul 27, 2026 | |
| Airbnb | Worker Management, Part 1: Office Registration | Coding | Jul 26, 2026 | |
| Airbnb | Worker Management, Part 2: Top Workers | Coding | Jul 26, 2026 | |
| Airbnb | Worker Management, Part 3: Promotions and Salary | Coding | Jul 26, 2026 | |
| Stripe | Merchant Fraud Risk Scoring | Coding | Jul 26, 2026 | |
| Boston Consulting Group | Dynamic Pair Sum Queries | Coding | Jul 26, 2026 | |
| Boston Consulting Group | Find a Submatrix Matching a Pattern | Coding | Jul 26, 2026 | |
| Boston Consulting Group | Longest Contiguous Character Run | Coding | Jul 26, 2026 | |
| Boston Consulting Group | Even-Position Monotonicity | Coding | Jul 26, 2026 | |
| Airbnb | Worker Management with Full-Shift Double Pay | Coding | Jul 26, 2026 | |
| Hudson River Trading | Count 2x2 Submatrices by Black Cells | Coding | Jul 26, 2026 | |
| Hudson River Trading | Cumulative Unique Bytes | Coding | Jul 26, 2026 | |
| Upstart | Minimum Absolute Pair Difference | Coding | Jul 26, 2026 | |
| Upstart | Lexicographic Word Frequencies | Coding | Jul 26, 2026 | |
| Upstart | Sum Multiples of 3, 5, or 7 Below N | Coding | Jul 26, 2026 | |
| Upstart | Add Drama to Text Groups | Coding | Jul 26, 2026 | |
| DE Shaw | Maximum L1 Distance Between Equal-Length Subarrays | Coding | Jul 26, 2026 | |
| Airbnb | Nested List Iterator with Remove | Coding | Jul 26, 2026 | |
| Citadel | Limit Order Book Matching Engine | Coding | Jul 26, 2026 | |
| Hudson River Trading | Market Data Signal Watcher | Coding | Jul 26, 2026 | |
| Amazon | Shortest Distance on a Circular Bus Route | Coding | Jul 26, 2026 | |
| Databricks | Design a Durable Local Event Writer | System design | Jul 26, 2026 | |
| Databricks | Design a Chat Application Cache Architecture | System design | Jul 25, 2026 | |
| Salesforce | Optimal Account Balancing | Coding | Jul 25, 2026 | |
| Count Sortable Splits | Coding | Jul 25, 2026 | ||
| Nested Set Structural Equivalence | Coding | Jul 25, 2026 | ||
| TikTok | Bubble Explosion | Coding | Jul 25, 2026 | |
| TikTok | Reconstruct Landmark Journey | Coding | Jul 25, 2026 | |
| TikTok | Reverse the Interior of Vowel-Bounded Words | Coding | Jul 25, 2026 | |
| TikTok | Uppercase-Lowercase Difference | Coding | Jul 25, 2026 | |
| Salesforce | Longest Increasing Subsequence | Coding | Jul 24, 2026 | |
| Salesforce | Maximal Square | Coding | Jul 24, 2026 | |
| MathWorks | Beautiful Arrangement | Coding | Jul 24, 2026 | |
| MathWorks | Find Minimum Cost to Remove Array Elements | Coding | Jul 24, 2026 | |
| Apple | Design Task Manager | Coding | Jul 24, 2026 | |
| Apple | Unit Conversion II | Coding | Jul 24, 2026 | |
| Cresta | Feature Flag Evaluation Engine | Coding | Jul 24, 2026 | |
| MathWorks | Group Shifted Strings | Coding | Jul 24, 2026 | |
| MathWorks | Longest Valid Parentheses | Coding | Jul 24, 2026 | |
| LinkedIn / Confluent / Shield AI | CI/CD Pipeline Orchestration System | System design | Jul 24, 2026 | |
| Tekion | Design a Car Service-Center Booking System | System design | Jul 24, 2026 | |
| MathWorks | Design a Product Authentication Platform | System design | Jul 24, 2026 | |
| Shopify | Design a Production-Ready URL Cache Service | System design | Jul 24, 2026 | |
| Ranked Deals Discovery and Claim Service | System design | Jul 24, 2026 | ||
| Capillary Technologies | Design a Loyalty-Data Insight Platform | System design | Jul 24, 2026 | |
| Akuna | Profitable Project Pairs | Coding | Jul 23, 2026 | |
| Goldman Sachs | Validate Binary Search Tree | Coding | Jul 23, 2026 | |
| Visa | Signal Pings | Coding | Jul 23, 2026 | |
| OnePay | Design a Community Chat Platform | System design | Jul 23, 2026 | |
| Roblox | Design a Like/Unlike Service | System design | Jul 23, 2026 | |
| Bloomberg LP | Word Break II | Coding | Jul 22, 2026 | |
| Microsoft | Binary String Swap Time | Coding | Jul 22, 2026 | |
| Microsoft | Minimum Effort Task Schedule | Coding | Jul 22, 2026 | |
| Tekion | Longest Balanced Substring After One Swap | Coding | Jul 22, 2026 | |
| Amazon | Sort an Array with Rotate and Flip | Coding | Jul 22, 2026 | |
| Akuna | Calculate Portfolio Rebalancing Deltas | Coding | Jul 22, 2026 | |
| Akuna | Maximum Label Difference in a Connected Component | Coding | Jul 22, 2026 | |
| Akuna | Minimize Malware Spread by Removing a Node | Coding | Jul 22, 2026 | |
| TikTok | Count Access Code Pairs | Coding | Jul 22, 2026 | |
| TikTok | Count Key Changes | Coding | Jul 22, 2026 | |
| TikTok | Travel Distance on Scooters | Coding | Jul 22, 2026 | |
| TikTok | Validate 3x3 Digit Windows | Coding | Jul 22, 2026 | |
| DRW | Last Round for Each Player | Coding | Jul 22, 2026 | |
| DRW | Shortest Compressed Length After Removal | Coding | Jul 22, 2026 | |
| Amazon / Goldman Sachs | Design a Financial Portfolio Dashboard | System design | Jul 22, 2026 | |
| Databricks | Design a Chat Application with Message and Thread Deletion | System design | Jul 22, 2026 | |
| Amazon | Loyal Customers Across Two Days | Coding | Jul 21, 2026 | |
| Amazon | Smallest Number With a Given Digit Sum | Coding | Jul 21, 2026 | |
| Oracle | Merge k Sorted Lists | Coding | Jul 21, 2026 | |
| Amazon | Design a Distributed Recurring Workflow Scheduler | System design | Jul 21, 2026 | |
| Amazon | Design Music Search, Playlists, and Playback | Low-level design | Jul 21, 2026 | |
| Airbnb | Most Frequent Reduced Digit | Coding | Jul 20, 2026 | |
| Airbnb | Rectangle Fit Queries | Coding | Jul 20, 2026 | |
| Airbnb | Robot Final Direction | Coding | Jul 20, 2026 | |
| Airbnb | Robot Inventory Tracking | Coding | Jul 20, 2026 | |
| Akuna | Communications Handler | Coding | Jul 20, 2026 | |
| Akuna | Maximum K-Star Sum | Coding | Jul 20, 2026 | |
| Microsoft | Maximum Pipeline Throughput | Coding | Jul 20, 2026 | |
| Microsoft | Maximum Strong Team Subarray | Coding | Jul 20, 2026 | |
| PhonePe | Luna and the Colorful Socks | Coding | Jul 20, 2026 | |
| Ramp | Design a Real-Time Payment Count Dashboard | System design | Jul 20, 2026 | |
| Meta | Design and Implement an In-Memory Tally Service | Low-level design | Jul 20, 2026 | |
| Assort Health | Design a Conversational Flight Search and Booking Agent | System design | Jul 20, 2026 | |
| Capital One | Sort Every Matrix Border Layer | Coding | Jul 19, 2026 | |
| Waymo | Average or Zero | Coding | Jul 19, 2026 | |
| Maximum Programmer-Problem Matching | Coding | Jul 19, 2026 | ||
| Visa | Minimum Score of a Path Between Cities | Coding | Jul 18, 2026 | |
| IDFC | Smallest Adjacent Concatenation | Coding | Jul 18, 2026 | |
| IDFC | Minimum Cake Cuts | Coding | Jul 18, 2026 | |
| Apple | Design a Large JSON Transformation Service | System design | Jul 18, 2026 | |
| Design a Real-Time Category Leaderboard | System design | Jul 18, 2026 | ||
| Cursor | Design and Implement a Pluggable Notification Rate Limiter | Low-level design | Jul 18, 2026 | |
| Goldman Sachs | Inherited Role Permissions | Coding | Jul 17, 2026 | |
| Goldman Sachs | Root of the Largest Tree | Coding | Jul 17, 2026 | |
| Uber | Design a Driver Payout System | System design | Jul 17, 2026 | |
| Microsoft | Design a Real-Time Multiplayer Game | System design | Jul 17, 2026 | |
| Adobe | Design Network-Backed Search Suggestions | Low-level design | Jul 17, 2026 | |
| Amazon | Customer Package Delivery Report | SQL | Jul 16, 2026 | |
| Microsoft | Alphabetically Smallest Palindrome | Coding | Jul 16, 2026 | |
| Zomato / Eternal | Robot Warehouse Optimization | Coding | Jul 16, 2026 | |
| Count Good Numbers | Coding | Jul 15, 2026 | ||
| Count Element Symbol Decompositions | Coding | Jul 15, 2026 | ||
| Convert Snake Case to Camel Case | Coding | Jul 15, 2026 | ||
| Uber | Last Truck to Leave the Lane | Coding | Jul 15, 2026 | |
| Citadel | Minimum Image Processing Cost | Coding | Jul 15, 2026 | |
| IBM | Count Strictly Increasing Subsequences of Length 3 | Coding | Jul 15, 2026 | |
| Goldman Sachs | Alternating Parity Permutations | Coding | Jul 15, 2026 | |
| Arcesium | Ordered Payload Release | Coding | Jul 15, 2026 | |
| ByteDance | Most Frequent Integer with Smaller Tie-Break | Coding | Jul 15, 2026 | |
| Uber | Chain of Command | Coding | Jul 14, 2026 | |
| Waymo | Design a Global Small-Image Cache | System design | Jul 14, 2026 | |
| Waymo | Design a Matchmaking Service | System design | Jul 14, 2026 | |
| Salesforce / Retool | Design a Rental Car Reservation System | System design | Jul 14, 2026 | |
| Salesforce / Slack / Ironclad | Design a Third-Party SaaS Integration Platform | System design | Jul 14, 2026 | |
| Sesame | Transcript Window Metrics | Coding | Jul 14, 2026 | |
| New Relic | Product of Array Except Self | Coding | Jul 13, 2026 | |
| OpenAI | CIDR IPv4 Range Iterator | Coding | Jul 12, 2026 | |
| OpenAI | IPv4 Forward Iterator | Coding | Jul 12, 2026 | |
| OpenAI | IPv4 Reverse Iterator | Coding | Jul 12, 2026 | |
| OpenAI | Convert an IPv4 Range to Minimal CIDR Blocks | Coding | Jul 12, 2026 | |
| OpenAI | Toy Language Generic Return-Type Inference | Coding | Jul 12, 2026 | |
| OpenAI | Count Matching Regions in Two Binary Grids | Coding | Jul 12, 2026 | |
| OpenAI | Largest Square Subgrid Under a Sum Limit | Coding | Jul 12, 2026 | |
| OpenAI | Backpropagation Through Sort and Median | Coding | Jul 12, 2026 | |
| Anthropic | Repair the Bootloader Program | Coding | Jul 12, 2026 | |
| Anthropic | Normalize a DNS Domain Name | Coding | Jul 12, 2026 | |
| Anthropic | Worker Management, Part 1: Office Registration | Coding | Jul 12, 2026 | |
| Anthropic | Worker Management, Part 2: Top Workers | Coding | Jul 12, 2026 | |
| Anthropic | Worker Management, Part 3: Promotions and Salary | Coding | Jul 12, 2026 | |
| Anthropic | Worker Management, Part 4: Double-Paid Intervals | Coding | Jul 12, 2026 | |
| Anthropic | Cloud Storage Compression and Decompression | Coding | Jul 12, 2026 | |
| Anthropic | In-Memory Database Historical Lookup | Coding | Jul 12, 2026 | |
| Anthropic | Banking Pending Transfer Acceptance | Coding | Jul 12, 2026 | |
| Anthropic | Cloud Storage File Versioning | Coding | Jul 12, 2026 | |
| Anthropic | Cloud Storage Prefix Trash and Restore | Coding | Jul 12, 2026 | |
| Amazon | Number of Islands II | Coding | Jul 12, 2026 | |
| Amazon | Maximum Sum of Heights | Coding | Jul 12, 2026 | |
| Amazon | Longest Palindromic Subsequence | Coding | Jul 12, 2026 | |
| Amazon | Group Anagrams | Coding | Jul 12, 2026 | |
| Amazon | Maximal Square | Coding | Jul 12, 2026 | |
| Amazon | Sliding Window Maximum | Coding | Jul 12, 2026 | |
| Agoda | 3Sum | Coding | Jul 12, 2026 | |
| JP Morgan | Bitwise XOR Subsequences | Coding | Jul 12, 2026 | |
| TikTok | Obstacle Placement Queries | Coding | Jul 12, 2026 | |
| Upstart | Coordinate Bounding Box | Coding | Jul 12, 2026 | |
| Upstart | Increase Exclamations and Convert Periods | Coding | Jul 12, 2026 | |
| Upstart | Interleave Equal-Length Strings by Column | Coding | Jul 12, 2026 | |
| Upstart | Scale Ingredient Quantities | Coding | Jul 12, 2026 | |
| IDFC | Find All People With Secret | Coding | Jul 12, 2026 | |
| DRW | Doctor Appointment Slot Assignment | Coding | Jul 12, 2026 | |
| DRW | Maximum Even-Sum Neighboring Pairs | Coding | Jul 12, 2026 | |
| DRW | Minimize Maximum Group Difference | Coding | Jul 12, 2026 | |
| Goldman Sachs | Cheapest Flights Within K Stops | Coding | Jul 12, 2026 | |
| Goldman Sachs | Word Ladder | Coding | Jul 12, 2026 | |
| Rippling | Camel Cards | Coding | Jul 12, 2026 | |
| Rippling | Article Vote Tracker | Coding | Jul 12, 2026 | |
| Rippling | Employee Resource Access Management | Coding | Jul 12, 2026 | |
| Rippling | Limit an Organization Tree's Height | Coding | Jul 12, 2026 | |
| Rippling | Distributed System Recovery | Coding | Jul 12, 2026 | |
| Rippling | Server Upgrade Planning | Coding | Jul 12, 2026 | |
| Rippling | Shortest Substring | Coding | Jul 12, 2026 | |
| Rippling | Lexicographically Minimum Stack Encryption | Coding | Jul 12, 2026 | |
| Rippling | Minimum Account Settlements | Coding | Jul 12, 2026 | |
| Rippling | Matrix Region Sum | Coding | Jul 12, 2026 | |
| Rippling | Maximum XOR Elimination Score | Coding | Jul 12, 2026 | |
| Rippling | Prime Tree City Labelings | Coding | Jul 12, 2026 | |
| Zomato / Eternal | Jump Game IV | Coding | Jul 12, 2026 | |
| IndiaMART | Reverse a String | Coding | Jul 12, 2026 | |
| Moody's | Longest Subarray with At Most Two Distinct Values | Coding | Jul 12, 2026 | |
| MulticoreWare | Minimum Coin Change | Coding | Jul 12, 2026 | |