The first step was a brief phone conversation with a recruiter, followed by a half hour phone screening with a potential hiring manager. Then, a full day at the HQ - interviews with several different people at various levels of seniority. A couple of them were job fit / conversational interviews; there were two cases (business and product) and a design challenge that required advance prep work. It was a challenging process and a long day, but my experience was positive - the questions asked were not unreasonable, and the case partners were helpful and made sure the feeling wasn't super tense. Interview prep is pretty straightforward - be ready to talk about your experience, practice case interviews (especially breaking questions down in a structured way), and have lots of questions ready for your interviewers! Don't drink too much coffee before! ;)