App. Ref.
Testing Ref.
API Management
Database Tools
IDE/Editor
Full-Stack & System Design
- Frontend Mentor – Best for frontend coding challenges.
- Exercism – Hands-on mentorship with structured coding exercises.
- CodeWars – Gamified programming challenges.
- Project Euler – Mathematical and algorithmic problems.
- GeeksforGeeks – Theory + practical coding problems.
Learning
Tools
Algorithm & Data Structures Practice
- LeetCode – Best for FAANG and competitive coding interviews.
- HackerRank – Focused on coding challenges and interview prep.
- CodeSignal – Simulates real-world interview problems.
- AlgoExpert – Video-based explanations for coding problems.
- Topcoder – Competitive programming and real-world challenges.
DevOps & Backend System Design
- System Design Primer (GitHub) – Open-source system design resources.
- Educative.io – Interactive coding and system design courses.
- Pramp – Peer-to-peer mock interviews.
Learning New Programming Languages
- Codecademy – Interactive coding lessons.
- W3Schools – Basics for web development.
- Udemy – Paid and free courses for different tech stacks.
Exploring....
- PenTest
- AI > ML > Deep Learning > LLMS | Generative AI
- Example-1,2,3
- Prompt Engineering
- PowerBI
- GraphQL SandBox | Explorer | Docs