The interview was simple and the interviewer asked simple questions. However, he was very arrogant and rude. Back then I was working as a waitress to support my master studies and he made fun of me with no reason.

The interview process was not very professional. The CEO was very arrogant and he actually didn't make any relevant with the job questions. You've been called in his office after waiting with people that were working and he explained what you will be doing and how little he will be paying you.