After applying, HR scheduled a phone interview. 5 minutes before the call was supposed to be held, I got a template email, saying that the call is canceled. No explanation, not even an apology for the wasted time. A week later, without speaking to me, I received an invitation to another phone interview. Eventually they called me for an interview and I decided to go, even though at that point I wasn't very interested anymore. Got the same vibe at the office, although the interviewer was nice. The process felt very unprofessional.

simple coding home assignment testing OOP design, 3 on-site technical interviews. On the first interview, you are asked to solve 5 simple coding questions ( find k smallest element in bst).