Went through a series of four interviews overall. They say the 4th interview with the COO is just an informal chat, but he grills you just as hard as the first 3. I got to the 3rd stage to be met with a racist interviewer who asked me where I originated from. Needless to say, I wasn't offered the job.

Super long interview process. I think 5 or 6 rounds across 3 months. Kind of had to bully the recruiter into getting back to me. Sometimes more than 2 weeks between responses.