Instead of the originally planned interviewer I was talking to a substitute. The call was plagued by a terrible connection quality on his side. He essentially went through a catalogue of low level programming questions most of which I could answer at least conceptually. The entire style was very much interrogation style with no effort to make the candidate feel comfortable. I had to repeat myself again and again on details like concurrency issues and floating point numbers since he did not really put in even minimal effort to understand what I was saying. All in all the outcome is certainly not the result of inability. I believe this company seriously needs to improve their recruitment. From what I read in other reports I am not the only one hit by such a strange interviewing style. Probably one has to get lucky not to be interviewed by one particular engineer to have a normal phone screen.

Phone interview followed by coding task (for one evening), followed by conversation with their TL about the position, followed by another phone interview. Then they invited me to the office, where I had another 5 1:1 interviews, approximately 1 hour each. All of the interviews were technical.