First you chat with the supervisor and if you pass that, you are then given a coding challenge with two questions. Pass that and then you are asked to do a three hour interview with three teams of two. The in-person certainly wasn't difficult, technically speaking. A couple of the engineers seemed adversarial, which as an interview style I don't think is particularly effective, but some companies seem to advocate that. Having over 20 years of experience I just found it petty.

I applied through their careers section and one of the recruiting team sent an email to me asking details of my career, experience, passion and references to open source projects & stack overflow profile page. I sent the required details and got a call from recruiter for initial screening. It was followed by a phone interview with a Director and then I attended 3 rounds of face to face at their Reston office. Recruiters were very friendly and the entire process completed in a week. Just hours after the interview when I was returning back to my home, I got a call from the recruiter and he detailed about the offer, salary. Not much of negotiations though, they provided the salary what I was looking. A very pleasant interview process. Most of the interview questions were very basic and simple to answer. If you have 3 - 4 years of experience in product development, especially with BIG DATA, it is very easy to clear interview.