Nearly two months, 4-5 rounds, and a one-line rejection with zero feedback. Each interviewer asked about completely different technical topics with no consistent criteria. At one point I was told I had been rejected due to a name mix-up with another candidate, only to be told days later I had actually passed. The people I spoke with were individually kind and professional. The process itself, however, showed little respect for candidates' time. If you're going to put someone through five rounds over two months, the least you can do is tell them why they weren't selected.