First, I had a phone interview with a member of their Human Assets team, who asked me basic questions I would expect in any interview process. Then, I interviewed in person with members of the sub-team I applied to join. Finally, I interviewed with other members of the larger team to which that sub-team belongs. I got the impression that the key interview was the second one - the first was more of a screen, and the final was more to make sure I could get along with the people I would be working with on the periphery.