Codingame has developed a platform to gamify coding education for developers [codingame.com], and provide a channel for employers to find prospective employees. From the website:
Practice & learn the fun way
Practice pure codeLearn new concepts by solving fun challenges in 25+ languages addressing all the hot programming topics.
Learn from the bestIn a matter of hours, discover new languages, algorithms or tricks in courses designed by top developers.
Become the expertOur approach has been designed to lead advanced developers to the next level.
There might be developers, team leaders, or employers in the Soylent community who would find it useful.