All process went well, organization and people were respectful and polite during interview. I were interviewed by 6 people, 3 of them join company 3-4 months ago. The process of interview between "newcomers" and people who were working there for a while were different. Newcomers were not really interested, and from my perspective were just formally asking questions. Other 3 interviewers were really involved and asking questions and describing their daily jobs. Other nice thing I heard that all of them like to cook. Well, may be that's why I were rejected. There were no real CS/algorithmic questions from technical side. I were asked about traversing tree and writing lazy-seq on clojure. There was no feedback on interview that I'm doing something wrong or I'm giving incorrect answer. Only one thing I definitely failed with was mixing tree-seq and post-walk function in clojure, not sure if it really matters. In conclusion, I think it was just bad moment to join company or may be company has culture agreement that I'm not fit in.

Initial interview with dev team, interview with senior engineer, interview with HR and senior team leads. Interview process took ~6hrs total (over several days), then was told I'd hear back in a couple days. Didn't hear back for weeks. Not the only interviewer who's had a this experience.