The process started with four technical rounds and one managerial round, along with one take-home assignment.

It seems the company is not clear about the requirements or skillset they want from a candidate. Even after clearing all your rounds, you might get rejected because they may have already hired another candidate in the background long ago, yet they continue with your interview rounds.

Other rounds were normal, but in one of them, the interviewer asked me to explain my current company's architecture. I explained it in detail, but it seemed he understood almost nothing because he didn't have the necessary domain knowledge. Based on this, he rejected me.