There were 2 phone calls. 1st one was introductory, 2nd one was to get overall experience. Then in-person interview which was about 3+ hours if they like you. They show you their product, then just walk you around, then they sit you down and go through a technical interview (coding problems about data structures and algorithms). Then if you do good on that then HR talks to you about benefits, then some few other people talk to you, then you can get home. Got an offer the next day.