One technical phone screen, then I was invited for an onsite interview. The phone interview wasn't too hard, and the interviewer was very friendly and engaging, asking a few personal questions and inviting me to ask whatever I wanted as well as asking a coding question. If you get onsite, get ready for the gauntlet. I was put in a room and 4 engineers came in for about 45 min each. They were friendly but mostly focused on technical stuff, I filled two whiteboards several times over. They seemed to care a bit more than average about getting the syntax correct on the whiteboard, but were ok with helping me out on a few questions that I could easily have referenced via google in a real programming environment. They'll send you a somewhat helpful blog post to help you prepare for the interview. Above all, remember that this is intentionally a high pressure situation and they're not expecting you to write perfect code on the first try. Always be thinking out loud and discussing your thought process.