I was initially contacted via a cold email by one of their recruiters, who encouraged me to apply for their summer position in their Technology Associates (TA) program. I submitted my resume, applied online, and then had an in-person interview when they came to my campus. I made it to the final round (top 6-10, I think) but ultimately didn't get an offer. They asked about tech details (typical algorithmic questions, nothing overly intense, all pretty interesting), cultural fit, and personality/discussion assessment. For personality/discussion assessment you just debate/discuss a topic with the interviewers (tip: I thought it was a debate, it turns out they just wanted it to be a discussion, so I was far too debate-like and argumentative). Cultural fit was a bit odd, definitely have some familiarity with Ray Dalio's "Principles" guide, they asked some very probing questions about my self development. This was the main place where BS does not fly AT ALL - when they ask you about your biggest flaw, they'll keep probing until they get to the issue you're most afraid of, and then analyze what you're doing to fix it.