I applied last October, had an on-campus interview a couple weeks later, then they flew me up to Seattle beginning of January. I was surprised how long the interview process took. The first interview was short, 30-45 minutes. The final round of interviews took most of the day. There were 3 interviews(however the number can range from 2-5 depending on who scheduled them for you), each lasting maybe an hour, maybe more. They told me the following week that I didn't get the job. The questions ranged from difficult to easy. It never felt like a grueling test, it felt more like a conversation about algorithms. Unfortunately, on the harder questions, I was the person who didn't know the topic too well.