Interviewer phone screen + 2 technical screening rounds + Virtual onsite (6 rounds - 4 technical, 1 Product Design and behavioral and 1 with the Hiring Manager (resume based))

The process was exhaustive yet I enjoyed it.

The day after the virtual onsite, the recruiter called and said that the feedback from the interviewing committee seems good and on the positive side. A couple of weeks later, a different recruiter called and said that they are not extending the offer neither they are rejecting it. Upon asking what went wrong and where I can improve, they didn't have a clear answer.

Not being able to give a clear answer or clear feedback for improvement after 9 rounds in total is one of the most unusual and frustrating things I found about the process.

LeetCode medium and easy medium questions.