I only know 2 stages, because my process stopped after second interview. First interview was a phone interview, the interviewer was nice, some general questions were asked. There were 3 interviewers in the second interview online, the questions were not difficult, I just didn't prepared well, so get well prepared and good luck.

Process consisted of two parts; a phone screening and an in person interview. Phone screening covered basic questions that focused on thought process, problem solving and work ethic. In person interview focused more on knowledge and personality fit for the office.