1. The initial round was a standard HR session. 2. Technical round with one engineer. The whole session was about discussing technical-related questions. I did not enjoy the session at all. The sound quality of the interviewer was really bad. I had to ask him multiple times during the interview to repeat his question because it was not audible. Many times, when I gave an answer he was making faces like I am so stupid. There was one time, that he was waving to someone during the interview. Most likely he was at the office and he saw some colleague, but it was really rude against the candidate (myself) and unprofessional. The interview invite stated that it would take 90 minutes, however we stopped after 60 minutes.