I applied for the position online, through the Amazon website. I got an email from a recruiting coordinator and set up a time for a phone interview. The call was on schedule, and the interviewer introduced himself and set out the steps that would happen in the interview. It was all straight forward situational questions. How would you handle this situation etc. Those same interviews came up during the day long session. I was invited back for a round of interviews with 6 different people, about 45 minutes each, except for the first which was the group recruiter, and that was just a quick 15 minute overview of how the day would go. I also went for lunch with another of them, and that was more of a social type of encounter, I guess to see what I was like on a personal level. Overall it was quite an enjoyable experience - it was talking about bringing in suppliers in a category that Amazon is lagging, and how would I make the case to them that it was worth it. The final interviewer was the only one that was a bit more aggressive and unfriendly, and we got off on the wrong foot a bit, but then settled down later.

1 hour phone call with 2 questions that they want answered in STAR format. Then moved to Loop interviews where 5 members will interview you. Some ask 1 question and dig deep with several follow up "probing" questions. Others might ask for 6+ STAR stories. Intense across the span of a day but everyone is very kind, professional, and informative. Overall a very well outlined process that you are prepared for via email with your recruiting team.