I applied online, and a week or so later was emailed with a request to do a phone interview. The phone interview lasted about 45 minutes, and was with the project manager and the lead developer. I was then invited to a follow-up on-site interview, which lasted about 7 hours and included 4 rounds of 1:1 interview, a technical presentation, and a lunch with several members of the team.

It was a one hour interview with half and half behavioral and technical. In general, the questions weren't hard, but I put "difficult" for interview difficulty because they showed me a graph and asked how I would write a program that calculates its cutoff frequency. I didn't have to write the code, but basically talk them through my approach. Also, they asked a lot of core concepts of CS questions.