I never applied to upstart. I think my resume was passed to them by a recruiter that I was in contact with. The process was taking more than 3 months before I end to that! very funny and inefficient system . Around mid Nov 2018, I was contacted by their HR through email asking to give them some time for interview. She was very lazy in responding to emails and interestingly each time I gave my availabilities (which I think was very flexible) for the next week, after 4-5 days she was responding back that their data scientists are busy and asking me to give another times and the same story. It was funny that we couldn't set any time for few weeks. I got curious and asked them before asking about any more availabilities somebody from recruiting team should call me. I talked to a guy which was cool and sharp and decided to continue interview process. It was mid December and he asked to give sometime for 2nd week of January. I talked to a data scientist on their phone interview. He asked some ML questions and a coding question which was relatively easy and straight forward. Then didn't hear from them for couple weeks until I asked for feed back then replied that feeb back was positive they want to do another phone interview. We set the date for the interview, few days before interview I asked to reschedule the interview. The same story again! lazy HR and busy data scientists!!! So I decided to end the process.