LinkedIn Developers - Discover career paths and land a job
hackattic - No nonsense, real world programming challenges
WayUp - Largest marketplace for students to find jobs & internships
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Go Commando - Giving college students access to jobs with great brands.
Takehome - Effective and humane coding challenges for candidates