Consisted of two phone screens, then a 5 round in-person interview. Two interviews were personality questions, one was design, and two were pure coding. Make sure you completely understand the question, I missed a small yet important part of the programming question and was rejected because of it. It's unfortunate, they seem like a great company to work for. I'll be going with my second offer at a different company. I doubt I'll reapply since I don't want to be seen to jump jobs a lot, though I'd wish they'd have seen past that one question. Don't stress, there isn't much to study, just basic data structures. It was an average interview, simpler than Google and Facebook, but more complex than smaller companies like Vonage.