Five arounds. 1 round behaviour 1 round math 1 round machine learning fundamentals 2 rounds of coding. If you have publications, they discuss your recent papers as well. The people are nice but the questions are pretty hard

0th round HR introductory call, asking about background, nothing technical; 1st round: math questions about probs and calculus; 2nd round: ML conceptual questions and system design; 3rd round: leetcode-style coding. 4th round: discussion with associate vice president.