Had two phone interviews. The first asked me basic questions about my research, why I wanted to work at the company, nothing difficult. The second interview was more technical, with probing questions on how various algorithms work, and what one might do given different types of data. A live online coding challenge was then given, which was somewhat difficult given the pressure of programming with someone figuratively looking over your shoulder.

90 minute coding challenge, initial phone screening, three 60 minute coding interviews on-site. In each interview, we discussed a prior project before the coding question. If you're okay with the SF location, I recommend considering Cruise because the projects are cool, and the people seemed extremely positive. Unfortunately, the recruitment process was also very disorganized, and some of the interviewers didn't seem particularly experienced at interviewing.