I had a phone screen with a recruiter, a technical phone screen with an engineer, and an on-site interview where I met with about 5 engineers for 45 min-1 hr sessions each and had to do whiteboarding. On the whole, it was fine, but a few of my interviewers were pretty rude/jerk-y to me, which was discouraging. I would ask clarifying/follow-up questions about the coding problems they'd given me and they just wouldn't answer or would be really snide and snarky. I left with a really negative impression of the culture... especially because I am female and they were all male. It also seemed like their codebase was a mess and that they weren't into mentoring at all, which wasn't the type of environment I was looking for.