Uber Software Engineer interview questions

I applied for a software engineer position online. After about a week, a HR contacted me to schedule a phone interview, mostly questions about my background and interest. Then there is another phone interview with a senior engineer. We talked about some of my experiences and projects, almost nothing technical. Three days later, I got an email saying they want someone with more experience.

Was referred to a recruiter through a friend, and settled on a date for a phone interview. The phone interview was with someone pretty fresh out of college, and I got the sense he didn't really know what he was doing. The question format was somewhat disorganized, but I was able to pass this round with some pseudo code the interviewer was happy with. The interviewer assumed I was applying for a front-end position and wanted me to code in javascript/angular, when I was applying for a backend position and didn't know any of the languages he was looking for. On-site, I interviewed with about 5 people before ending the day. Some of my interviewees seemed frazzled when coming in; I got the impression they were pretty stressed out. None of the questions I was asked were particularly hard. The company gives you a laptop to code on for your interview, but interviewers were pretty happy with just coding on a whiteboard instead. None of my interviewers knew the password to the laptop anyway. I got an offer from Uber, but had the offer revoked when I started asking some questions about what it's like to work there to the manager. I got the impression some of my interviewers weren't really all that happy which raised a few alarms for me. The stock compensation was generous, but the company refused to budge on anything else in a very take it or leave it kind of attitude. It's insulting how they try to come across as doing you a favor when you did all the work in preparing for the interview loop.