I had a prescreening with HR. I ended up having a total of 3 interviews afterward. From start (hearing from HR on interview request) to finish (time of offer), it was approximately two months. It was fairly laid back for me, as I have a lot of industry knowledge. If you also have the knowledge, this will be easy for you to talk to. I met with HR, two team leaders (separately) along with a peer in each of those, then finally the operations director. It was a great experience and I don't typically say that about interviews at 4 rounds.