Achieve code mastery through challenge. Improve your skills by training with others on real code challenges

Kata In our dojo, ...

Kattis helps companies make safer recruitments and attract the best developers with its dynamic challenge platform. With Katt ...

A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve rea ...

At Geektastic we help our client's thoroughly evaluate their future talent using our unique peer reviewed code challenge platf ...

BitDegree is a blockchain powered education platform that aims to revolutionize education and the blockchain technology. The p ...

VIM Adventures is an online game based on VIM's keyboard shortcuts (commands, motions and operators). It's the "Zelda meets te ...

Explore and attempt front-end coding challenges on Codier

LeetCode is a platform for learning and improving coding skills with the goal of being fully prepared for programming intervie ...

Screeps is a massive multiplayer online real-time strategy game. Each player can create his or her own colony in a single pers ...

HackerEarth is building the largest hub of programmers to help them practice and improve their programming skills. At HackerE ...

CodeSignal is the leading provider of assessments for technical recruiting. As the creator of the Predictive Coding Score, Cod ...

CheckiO is expanding the world’s code literacy through gameplay. We always wanted to create the most entertaining game where g ...