Intro phone call, phone screen, small coding assignment, onsite with four 1:1 interviews. It was mostly a pretty standard interview process. There was an intro call, an algorithms phone screen, and a small coding project that involved making an efficient search/query with a clean API. Afterwards, I was invited up for a half day of interviews. I thought it would only be 2 hours long, but it was almost 4. Again, pretty straight forward stuff with a mix of high level ML/statistical discussions to algorithms questions with whiteboarding. Then I had a "culture" interview I would best describe as an interrogation. It was extremely uncomfortable and downright hostile. I should have withdrawn my then and there. What really annoyed me what that the interviewer wanted new hires to be comfortable working 10-12 hour days and on weekends and that everyone was doing it. I gave a pretty neutral answer along the lines of, "I don't love that, but I understand its a startup and everyone needs to chip in" and he implied that I was lazy. Then he asked me a bunch of "soft" questions like, whats your greatest strength/weakness, biggest challenge, etc. Again, I was extremely annoyed and uncomfortable at this stage and really didn't want to be there anymore and I guess he picked up on that. Then he goes into this big spiel about how his biggest strength is that he's a "hustler, no bullsh*t". I'm interviewing the company just as much as they are interviewing me and decided this wasn't going to be a great fit.