It was a three tier interview process. The first two interview were over the phone then the third interview was three one-hour interviews back to back with different people. The first two interview were with HR and the third was with three different members of the team I would have worked with. I did not end up getting the position but I do know that there was not a 4th round of interviews.

It took very long to hear something back in between each phase. There were multiple interviews. Email questionnaire, then phone interview, then video interview. Finally, in person interview with managers.