DojoCode

CodinGame by CoderPad is an online technical screening platform that enables recruiters, tech leaders and programmers to evaluate and shortlist candidates quickly with confidence. It lets you validate tech skills remotely, get rid of bias, reduce hiring costs and shorten your time to hire. Its ease of use allows anyone, regardless of their tech skills, to quickly create a coding test in just a few clicks. Choose from a question bank of more than 3900 questions and exercises that supports 60+ programming languages, domains & frameworks and over 80 preset job roles of varying skill levels. With a 97% completion rate, its fun real-life questions and exercises ensure a positive candidate experience. Customers include Nasdaq, Huawei and Electronic Arts.

Codeforces is a project joining people interested in and taking part in programming contests. On one hand, Codeforces is a social network dedicated to programming and programming contests. On the other hand, it is a platform where contests are held regularly, the participant's skills are reflected by their rating and the former contests can be used to prepare. Codeforces constantly develops and we plan to improve the platform to give the participants the opportunity to organize their own contests, filling the project with learning content, developing Codeforces as a training and learning platform. Contests are regularly held on Codeforces. Participating in them is free and open to everybody. Every month we organize approximately six contests. To participate, you have to be registered on the site (if you have an OpenID or a Gmail account, then you won't even have to memorize the password) and register for the oncoming contest. Make sure that you are present in the list of the users.