I interviewed at Uber in December 2015.

Overall, the interview was not hard at all.

First, there was a quick call with the recruiter, then a phone screen, and then an invitation on-site.

The technical questions were not very hard and nothing was unexpected: hashmap, BST, simplified DP problems, and so on. The interviewers were nice to talk to. I learned quite a lot about Uber, and it was pretty cool. I think I did pretty well, but there were a couple of hiccups, especially at the end of the day when I got tired. Also, I might have asked too many questions about Uber's work-life balance. So, the next day I was told that I was not a good fit for Uber.

However, my good impression about the interviewing process and the team was undermined by what happened next.

I interviewed at HQ, and they gave me a promotional code so I could use Uber to get there from the South Bay Area. The code didn't work, so I just used my credit card to pay for the rides to and from Uber. The recruiter on-site told me to submit the expenses, and they would reimburse me. Their form says it takes 15 days to get the money back, but I haven't heard from them for about 40 days already. And the most disappointing thing is that the recruiters just ignore my emails.

Common, Uber, you've got more than $6B in funding; I am sure you can afford being honest to your promises.

Nothing unexpected, standard questions on programming.