I was contacted by a recruiter on LinkedIn. I had a phone screen later that month and an onsite interview a few weeks later. I had a follow-up remote interview two weeks after the onsite.

The phone screen question was a fairly straightforward Google Doc data structures question. The four one-on-one onsite interview questions were largely data structures with an appreciable algorithms component. The follow-up question was a combinatorics/set theory-type question.

Overall, the process was fair but challenging.

Data structures predominated, but there was also an emphasis on algorithms and some applied math.