const stack = {
  frontend: {
    code: ['HTML5', 'CSS3', 'Sass', 'JavaScript', 'TypeScript'],
    libraries: ['Next', 'React', 'React Router Dom', 'Redux', 'Styled Components'],
    mobile: { 
      code: 'React Native'
    }
  },
  backend: {
    code: ['Node.js', 'MongoDB', 'Express', 'TypeScript'],
    libraries: ['Mongoose', 'Jsonwebtoken', 'Bcryptjs', 'Express-validator'],
  },
  versionControl: ['Git'],
  learning: ['Jest', 'Testing Library']
}