One phone interview, one in-person interview with 2 interviewers, one interview with a director. I was referred by a former co-worker from a different company. The interview process was smooth and casual.

They make and effort to make it a nice interview process. They are very open and let you observe an employee in action to get a feel for the position. First it was a phone screen which was probably the hardest part, then and interview with 2 managers more of a get to know you kind of thing. The third interview they call you back in to speak with two managers again. The fourth interview is the offer. The only reason I did withdrew is the salary.