The onsite consists of a takehome you need to do before the onsite, about 2-4 hours. Then, one round talking through your takehome and 2 rounds of common system design topics. The entire process is disorganized with the recruiter forgetting to set you up for certain things and many interviewers being late. Some interviewers are nice but others are condescending for no reason, some will insist your solution is wrong and keep correcting you even though you presented the textbook solution for their question. Overall it gives you the feeling that they are better than everyone else because they are early on the AI hype train.

Reached out by recruiter. Then a takehome assignment which is designing a agent call scheduling tool with consideration of client priority. The problem is not difficult, I finished the whole problem with one more optional optimizations and one stretch bonus task. The interview is through a zoom to discuss my solution, people late for ~7-8 mins, and we went through my solution with a live check, and I answered all questions. Received response from recruiter after 2-3 days with rejection and no reason.