Codewars

About Codewars

Codewars is a coding practice platform where developers solve programming exercises called "kata" to build and demonstrate skill. Kata are created by the community, ranked from beginner to expert level, and can be solved directly in the browser with test cases used to validate solutions as they progress. The platform supports more than 55 programming languages.

After solving a kata, users can compare their solution against others submitted by the community and discuss approaches, techniques, and feedback. Completing kata earns honor and contributes to rank progression and leaderboard standing. Users can also author their own kata to teach specific techniques or challenge other members.

The platform is aimed at developers looking to practice coding, learn new languages, and engage with a peer community, as well as those interested in mentoring others through kata creation or solution review. It is built on Qualified.io, which is also used as an assessment platform for organizations for hiring, upskilling, and certification.

Key features

• Coding challenges called "kata" ranked from beginner to expert level
• Supports 55+ programming languages including Python, JavaScript, Java, C++, Go, and Rust
• Instant feedback via in-browser test cases (TDD) while solving kata
• Compare your solution with other community solutions after completing a kata
• Create and publish your own kata for others to solve
• Earn honor and ranks, and move up community leaderboards

Frequently asked questions