Three phone interviews in total. The first was a pretty basic call with the recruiter. The second was a 45 minute technical phone interview with a SE. The format was a little different that I was used to considering it was all system/design based compared to the usual coding through an online editor. The interviewer was very helpful along the way with each question which made it a very low stress interview. The third interview was also 45 minutes, but this time it included a code editor. I was asked to implement a certain part of the merge sort algorithm, but my interviewer called an hour early so it went much rockier than expected.