There rounds, first is just a general chit chat and some statistical brain teasers, i got an impression that interviewer googled them 10 minutes before the interview. Second was a tale home assignment dor time series modelling. Third round was with hr. Nothing special either

6 steps, including first interview with recruiter, second one with hiring manager, third one solving a use case, then a presentation of use case, and two more interviews with higher managers.