One phone screen, one phone interview. The first phone screen was with a recruiter to determine what my experience level was and whether or not I was a viable candidate. The phone interview was with an engineer, who was really nice, but it was awkward having to talk through code over the phone.

I connected with them at my university's career fair and heard back almost immediately to schedule a phone interview. The first interview was a behavioral phone screen which asked about things from my resume and why I was interested in the company. The second one was a technical phone screen which was 40 minutes - 60 minutes long and asked one coding problem. I would review your data structures before doing this because they are very quick with their responses.