20 min phone screening (rate your Skills in various areas (Machine Learning, Linear Algebra,.. rate from 1 to 5), Question about Gradient Descent) 1hr on-site interview ( CV, Experience, Analytical Puzzle) 1hr technical phone interview (Talking about recent project)

Very quick turnaround (1 day) between applying and getting a phone screening. However I got the clear impression that the screening was outsourced (very strong Asian accent, the guy seemed to be reading the company description). This is OK, but I'd rather they were transparent about it. Unclear how technical the interviewer was, so I was unsure in what level of detail I could go in my answers and I probably kept it more high-level than needed. After the interview, it took them two weeks to turn me down.