I had 5 or 6 rounds and talked with HR, future colleagues, and managers. I followed the Amazon interview model. The problem for me was that the real case study (and how the eventual job would be for 80+% of the time as the interviewer told me) was only at the very last round. In my opinion, having the case study at the very end of the interviewing process could potentially cause issues for both the candidate and the company. For the candidate, they may have invested a significant amount of time and effort into the interview process, only to find out at the last minute that the position may not be a good fit for them based on the case study. For the company, they may have invested a lot of resources into the candidate, only to find out that they may not be the best fit for the position after the case study. It would make sense to place the case study earlier in the interview process, such as in the second or third round, so that both the candidate and the company can determine if the position is a good fit as early as possible. This would save time and resources for both parties and ensure that the hiring process is efficient and effective.

Interview process is challenging but expected as everything you need to know is available online. They will schedule you with 4 employees from the team or organization you will work with and 1 completely separated from your organization as a "bar raiser". No need to work to impress one specific person, know 12-14 differentiated STAR formatted stories by memory.