I applied through a recruiter. The process took 3 days.

Interview with head of engineering. Standard interview questions. Didn't feel like a conversation; they seemed very disengaged and weren't interested in my experiences or asking any follow-up questions. They answered my questions very well, though, and explained their projects and company well.

Showed me a function of a random number picker and asked me to explain it. Then asked me if this was in a function was a black box, how many times would I want to run it to make sure it's a randomizer.