Infoarena (non-profit)

https://infoarena.ro/
Programming competitions and training for Romanians Infoarena is the largest Romanian community of Computer Science geeks. Founded in 2004, it now has over 30,000 members studying computer science and training for programming contests. Contributors to Infoarena are some of the highest achieving Romanian students in computer science. Sponsors include Facebook, Google, Microsoft, Adobe, ORACLE, and others.