Google

There was a series of very difficult interviews. First, I had to meet to see if I was Google material, if I fit the vibe. Then, I had to do a series of difficult technical interviews back to back.

Very dependent on behaviorals. I think Google is shying away from technicals. Know what and why of your resume. The interview process was lengthy and required a lot of preparation. I'd suggest using some tools to prepare behaviorals as well.

The technical interview pushes your limits on your understanding of optimization problems. I felt that my studies only scratched the surface of the critical thinking required for this position, and that was pretty much how it went.