Skills speak
louder than words.
Master DSA, crack interviews, and land your dream tech job. Join millions of students building their future with Decodex.
Simple Path To Build Your Skills
A structured path to transform you from a beginner to an interview-ready developer.
Learn Fundamentals
Master programming basics, data structures, and algorithms through interactive lessons.
Practice Daily
Solve 2,500+ problems. Build muscle memory with daily challenges and contests.
Mock Interviews
Simulate real interviews with AI. Get instant feedback on your solutions and approach.
Get Placed
Apply to top companies with a verified skill profile. 85% of our students get placed.
2,500+ Problems.
Unlimited Practice.
From easy warm-ups to hard challenges. Practice patterns used in real interviews at Google, Amazon, Meta, and more.
- Problems tagged by company and topic
- Real-time code execution in 40+ languages
- AI-powered hints when you're stuck
- Video solutions by top educators
Your 24/7
Coding Buddy.
Stuck on a problem? Need a hint? Our AI mentor explains concepts, debugs your code, and guides you without giving away the answer.
- Explains complex concepts simply
- Provides hints, not answers
- Reviews your code for improvements
- Suggests what to learn next
Think of recursion like Russian nesting dolls 🪆
Each function call is a smaller doll inside the previous one, until you reach the smallest doll (base case)!
Master Interview Nerves
Experience the exact simulation used by elite candidates to handle millisecond-accurate timers and complex logic gates.
High Pressure Assessment Simulator.
Experience the exact environment used by thousands of elite candidates to crack heavy-weight recruitment rounds.
Your dream job is just
a few problems away.
Join 11M+ students already leveling up their skills. It's free to start.