Asked in depth questions on the resume. Kept digging and asking more and more questions about what I did there. Know your resume inside and out, otherwise you will get stumped. Everything on there should have a story behind it. You should also brush up on your technical knowledge of the position you're applying for. This was not necessary in my interview but I've found that always helps.

I had a great experience. I had a phone interview first that took 30 minutes and was mostly fit. I then had one more slightly longer phone interview, followed by a final interview in New York. I had a chance to meet about 7 of the people I will be working with, all of which were really friendly and easy to talk to. Some of the technicals were difficult, but the interviewers were very patient and mostly looked at your approach to the problem. I felt like everyone was very open, energetic, and had only good things to say about working there. One of my best interview experiences.