Uber Data Scientist interview questions

Started out with a conversation with the recruiter, who then sent out a take-home test to be returned in a week. The test wasn't too hard, one question tested SQL ability, another tested product sense (what metrics would you consider, etc) and the third involved building a predictive model (any programming language accepted). The follow-up was then a conversation about the role with the data science lead, along with some simple product sense questions. If this goes well, you're invited for an on-site with 5/6 members of your team. Impress them and then congratulations, the offer is yours!

I got contacted by the HR a month after I applied. The woman I was in contact with (by mail) was nice and easy going. A first interview was scheduled. She didn't call me and didn't even contact me afterwards. I sent a mail to know what had happened, she told me she "was having an issue, as the number is international" (I'm French and live in France). We planned another interview and same thing happened. She sent me a mail to ask me if I could call. I was surprised a company like Uber had issues calling an international number, that's the first time it happens to me, but well, I called with my cellphone so we could start the interview. We started with classic things about my current position and my background. Then, she asked me if I would need a working visa (H1B), I said yes and she told me that it wouldn't be possible right now as they can ask for a visa only in april next year. Then she told me that she would keep my CV and stay in touch with me later on. Overall I was quite frustrated with the process. I expected Uber to be more professional.