The hiring team was good and I could detect good level on each interviewe. The process took 4 months to be finished due to constant rescheduling from them. The recruiter agency told me constantly I had good feedback from the team and they'd likely offer Staff engineer position. After 4 months and 5 interviews however they said my level is "High Senior" and not even Staff and they preferred not even making an offer. They could have stopped the process earlier instead wasting the time of everyone. They seem to be skilled but I don't think they are mature enough to understand principal level positions at unicorn companies. For the coding session using AI part of the feedback was "you didn't finish the exercise on time" what I consider a extremely junior feedback.