1. 1. React
2. Next.js
3. Typescript
4. Jest
5. Playwright
6. React testing library
7. Mocha/chai
8. ESlint
9. Performance optimization ( bundle splitting, code splitting, lazy loading )
10. Git
11. HTML5
12. CSS
13. Javascript
14. Compare React Angular Vue
15. NodeJS
16. React Query
17. GraphQL
18. WCAG
19. Jenkins CI/CD
20. ES6+
21. Redux
22. webpack, vite, parcel
23. npm/yarn
24. Containerized deployment with Docker/Kubernetes, Familiarity with containerization (Docker), orchestration (Kubernetes / K8s), and cloud platforms (AWS).
25. React Native
26. Data structures
27. Infra: AWS, Docker, Terraform, Vercel
28. Tooling: Nx, GitHub
29. data visualisation tools such as D3.js, Canvas/WebGL
30. Angular, NgRx, Nx, Redis, Azure Cloud, Kubernetes, Akamai
31. Knowledge of web services technologies such as SOAP, HTTP, WSDL, XSD, and REST
32. Experience in a broad range of software design approaches and common UX patterns.
33. MVC/MVM frameworks (e.g. React.JS, AngularJS, Vue)

📚 Best 100% Free Resources for Front-End Interview Prep

This page contains a curated list of completely free, high-quality resources to help you prepare for Senior Front-End Developer interviews. Topics include HTML, CSS, JavaScript, React, testing, system design, UI challenges, and more.

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🧠 Core Front-End Skills

✅ HTML / CSS / JavaScript

• The Odin Project
  Full-stack curriculum covering HTML, CSS, JavaScript, Git, and more. Great for foundational learning.

• JavaScript.info
  Deep-dive into modern JavaScript from the ground up. Highly recommended for all levels.

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⚛️ React and Modern Web Development

• Full Stack Open
  Free course covering React, Redux, TypeScript, GraphQL, testing, and CI/CD. Made by the University of Helsinki.

• Codecademy – Free Courses
  Some React and JavaScript tracks are available for free. Check course details.

• Scrimba – Free Courses
  Interactive tutorials for React, JS, and more. Great for hands-on learners.

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🎨 UI Implementation Practice

• Frontend Mentor
  Real-world frontend challenges with design files. Many projects are free. Great for building portfolio projects.

• Dev Challenges
  Similar to Frontend Mentor. Practice UI, accessibility, responsiveness, and more.

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🧪 Testing & Performance

• Full Stack Open - Testing module
  Learn how to test React apps using React Testing Library and Jest.

• Google Web Fundamentals
  Covers performance optimization techniques (e.g., lazy loading, code splitting).

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🏗️ System Design & Architecture

• System Design Primer (GitHub)
  Comprehensive guide for system design interviews. Includes frontend considerations and examples.

• Tech Dummies - Narendra L (YouTube)
  Visual explanations of system design concepts (e.g., load balancers, caching, microservices).

• Hussein Nasser (YouTube)
  Deep dives into scalable architecture, CDN, HTTP, and backend/frontend performance.

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🧠 Algorithms & DSA

• NeetCode 150 (GitHub)
  Structured algorithm practice list, curated for interviews. YouTube videos included.

• LeetCode – Free Questions
  Many algorithm and front-end questions are free to practice with limited daily use.

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🤝 Mock Interviews & Practice

• Pramp
  Free peer-to-peer mock interview platform. Practice live with other candidates.

• Interviewing.io (Limited free interviews)
  Sometimes offers free mock interviews with engineers from top companies.

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🧰 Tooling & DevOps (Optional but Useful)

• Docker Curriculum (GitHub)
  Learn Docker with practical examples and projects.

• FreeCodeCamp – DevOps Playlist
  Covers CI/CD, Docker, AWS, etc.

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📨 Newsletters & Blogs

• UI.dev Blog
  High-quality articles on JavaScript, React, and TypeScript.

• Bytes.dev Newsletter
  A fun, concise JavaScript newsletter by the creators of UI.dev.

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📌 Tip

Bookmark this page and track what you've completed in a GitHub Projects board or Notion. Consistency beats intensity. ✅