The process took 5 weeks. I interviewed at Uber in Nov 2018
Interview
I had a call with a recruiter, followed by a technical coding interview, a technical research interview and a culture fit interview with current research scientists. All were over the phone/internet.
Interview questions [1]
Question 1
The coding interview was a straight forward question where brute force + dictionary was optimal. This was followed by some slightly harder follow-up questions on modified assumptions about the input data.
The research interview was a pretend first research meeting on a topic given by the interviewer. We brainstormed together and the interviewer probed (fairly lightly) my knowledge on the fields that we touched upon.
I applied online. The process took 2 weeks. I interviewed at Uber
Interview
The conversation with HR and hiring manager went very well. The next round was asking me to work on a case and sent back my code and PowerPoint to them within 48 hours. They sent me rejection letter a week later. I'm really frustrated with their feedback. They want to hire someone with some kind of skills. The case I worked on had nothing to do with those skills. Every candidate spends lots of time and makes every effort to prepare for job interviews. PLEASE respect other's time and effort.
I applied through an employee referral. I interviewed at Uber
Interview
I did not make it past the first initial call with HR. If I had continued, the process would have included an interview with a manager, a problem to solve, a portfolio review, and an onsite interview
Although I did receive positive feedback from the recruiter during the interview and I was told I was moving on to the next round, this turned out to not be the case.
I'm not entirely sure what went wrong, but it could be that I did not send a thank-you note until the following week, which might have been interpreted as lack of enthusiasm. Regardless of your personal feelings about superficiality, I recommend that in your interview with Uber you act extremely excited about the company and the product. And send a thank you note immediately.