A recruiter contact me for a initial interview which was basically to get to know me. After that I've completed a code challenge that was to create a twitter API supporting basic functions like return the tweets from a user, start following a user, etc, in Java/Spring. I've passed the code challenge and had an interview with one of the founders, to give me a overlook about the next step. Finally, got a technical interview with two guys, one from frontend to implement something using Javascript and the other backend using Java.