I was referred by an employee and contacted by their recruiter. My recruiter was one of the nicest people I have had the opportunity to work with. The entire process was so smooth and handled exceptionally well.

I was first contacted via email to set up a phone interview to discuss my likes and interests so the recruiter could decide which teams to forward my resume to. After this, I had two phone screens. There was an NDA about the questions, but they were very straightforward and there were no ultra-difficult questions. All questions were simple discussions of algorithms and data structures. Make sure you know your basics extremely well. I mean, extremely! Other than that, you're fine.

After these two interviews, I was asked to schedule a five-hour, back-to-back Skype interview session. All the interviewers were extremely nice, and the interviewing was great fun. They ensured you were comfortable and allowed you to be creative and efficient. I was asked several questions about algorithms, data structures, and design. Make sure you know the basics of OOP design and are comfortable deconstructing a problem to design a good solution.

After four interviews, my brain refused to work in the last one, and I was unable to answer a very simple data structure question. Even my interviewer recognized I was probably tired after all the interviews and very patiently tried to help me out. In the end, I was able to barely come up with the solution. After this, I was asked to take up one more Skype interview, and this one went very well.

I was contacted after about a week by the recruiter, and they made an offer.

Nothing unexpected. Questions are very straightforward.