Started off with an online assessment with 4 parts. The first 3 were describing how you would implement the solution to a problem and discussing runtime and trade offs, and the final part was coding some of the solution you described. After passing that, I then had a 60 minute phone interview with an engineer. Talked a bit about a past project of mine, then spent the last 45 min solving a system design question together. The on-site consisted of 4 hour long whiteboard coding sessions and lunch with 2 engineers. The questions were fairly straightforward, with the usual mix of tree, hash table, etc questions. The interviewers gave hints pretty frequently, with an emphasis on how you took the hints over whether they needed to give you one. Overall, I found each interview to be a really pleasant, collaborative experience. Definitely the smoothest interview process I’ve been a part of.