Master Coding Interviews.
Land Your Dream Job.
Practice on 245 coding problems, take timed mock interviews, and learn from comprehensive tutorials. Build your skills with a growing collection of challenges.
Everything You Need to Succeed
A comprehensive platform designed to help you excel in technical interviews
Coding Problems
245 problems covering arrays, strings, trees, graphs, dynamic programming, and more. Practice problems across Easy, Medium, and Hard difficulty levels.
Explore Problems →Mock Interviews
Simulate real interview conditions with timed mock interviews. Practice 2-3 problems with 30-60 minute time limits to build confidence and speed.
Try Mock Interview →Learning Paths
Structured learning paths covering algorithms, data structures, and problem-solving patterns. Learn the fundamentals before diving into practice.
Start Learning →Coding Games
Make learning fun with interactive coding games. Challenge yourself with puzzles and compete with others while sharpening your skills.
Play Games →Leaderboard
Track your progress and compete with developers worldwide. Climb the leaderboard by solving problems and completing challenges.
View Rankings →Blog & Resources
Read in-depth articles, interview tips, and algorithm explanations. Stay updated with the latest trends in software engineering interviews.
Read Blog →How It Works
Your path to interview success in three simple steps
Choose Your Path
Select from curated problem sets, learning paths, or jump straight into mock interviews based on your experience level.
Practice & Learn
Solve problems in our interactive code editor with support for multiple programming languages. Get instant feedback on your solutions.
Ace Your Interview
Build confidence with timed mock interviews that simulate real conditions. Track your progress and land your dream job.
Code in Your Favorite Language
Support for 12 popular programming languages
Why Choose CoderChallenges?
A platform built to help developers practice and improve their coding skills
Focused Practice
Practice with purpose. Each problem is designed to strengthen specific algorithms and data structure concepts used in real technical interviews.
Instant Feedback
Run your code instantly and see test results in real-time. Get immediate feedback to iterate quickly and learn from your mistakes.
Growing Library
Our problem library is constantly expanding with new challenges. Practice everything from basic arrays to advanced graph algorithms.
Frequently Asked Questions
Everything you need to know about CoderChallenges
What is CoderChallenges?
CoderChallenges is an online platform where developers can practice coding problems, improve their programming skills, and prepare for technical interviews. We offer hundreds of algorithm and data structure problems in multiple programming languages including JavaScript, Python, TypeScript, Java, C++, and more.
How many coding problems are available on CoderChallenges?
CoderChallenges currently offers 245 coding problems across different difficulty levels (Easy, Medium, and Hard). Our library includes problems covering arrays, strings, linked lists, trees, graphs, dynamic programming, and many other topics commonly tested in technical interviews.
What programming languages does CoderChallenges support?
CoderChallenges supports 12 programming languages including JavaScript, TypeScript, Python, Java, C++, C#, Go, Rust, Ruby, Swift, Kotlin, and PHP. You can solve any problem in any of these languages.
Are mock interviews available on CoderChallenges?
Yes! CoderChallenges offers 7 timed mock interview sessions that simulate real coding interviews. Each mock interview includes multiple problems with time limits based on difficulty, helping you practice under realistic interview conditions.
Is CoderChallenges free to use?
CoderChallenges offers both free and premium features. You can access many coding problems, learning resources, and practice materials without any cost. Create a free account to track your progress and access all features.
How does CoderChallenges help with interview preparation?
CoderChallenges helps with interview preparation through: structured learning paths that teach algorithms and data structures, hundreds of practice problems similar to those asked at top tech companies, timed mock interviews that simulate real interview conditions, detailed solutions and explanations for each problem, and a leaderboard to track your progress against other users.
Ready to Start Your Journey?
Start practicing coding problems today and build the skills you need to ace your next technical interview.
Get started today • 245 problems available • 12 programming languages