I was referred by a friend and I went through one Phone Call and one On-Site (Virtual) interview. Phone call: 1 interviewer, one programming question (easy leetcode), few ML easy questions (bagging vs boosting, other supervised algorithms that I knew of, supervised vs unsupervised learning and my previous works) On-Site: 5 interviews with 5 different people. 3 interviews on my previous ML projects, general ML/Statistics questions, some questions about DL (both images and text). 1 programming interview and 1 based on LPs with manager.