Uber Sr. Software Engineer interview questions

Besides briefly discussing my experience, they asked a simple design question and a small coding problem. The interview went well with no real hiccup - answered all the questions to their satisfaction (presumably), including the coding problem that passed their test suite. However, I received a rejection with no real feedback or any takeaway.

Applied from Uber Job site. 1 Phone Screen, then got invited for Onsite. It was in 555 Market St. I went to their HQ by mistake. Turned out all Onsite Interviewer are remote, except one of them. The in-person FrontEnd engineer seems dislike me somehow, but he was the person to go lunch with me. Probably because he was the only in-person interviewer that day, so he had to do the lunch. Lunch was 30min, the interviewer didn't eat, watch me eating instead, very awkward. Some interviewers were nice and active. But the last interviewer seems busy with his project and didn't pay much attention to the interview, also because it was remote, made it hard to success. I didn't expect Onsite is actually using video conference. Their office in 555 market st seems a bit mess. Maybe that's Uber style, you can't expect much.