The interview process started with two 30 minute technical phone interviews. In both they immediately started with technical questions. The second interviewer wasn't even aware that I previously had an interview. They flew me to their headquarters and I had a full day of interviews. There were six 50 minute technical interviews. Each one was lead by a different engineer. I also had lunch with the head of the team and he asked me more general questions about my experience and what I was looking for.