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FaceCode - Hire top tech talent with video interviews
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
HackerEarth - HackerEarth is the network of top developers across the world. They connect to start-ups, tech companies, organizations and discover the best developer jobs. They participate in programming challenges and compete against other top developers.
Ha.ckathon - Find the right Hackathons for you!
Daily Coding Problem - Get exceptionally good at coding interviews