Four stages of interviews: first a pre-interview chat with recruiter, then quiz interview, then host-matching interviews, then a culture-fit interview. My interviewers were all nice and helpful. The quiz interview is not difficult if you review your last machine learning and rl course.

~5 interviews: initial phone screen, technical screen, research interviews with 2 different interested teams, hiring manager/culture fit screen. Technical screen was the most intense, the rest were pretty laid back.