Phone call. 10 second introduction, then straight to technical questions. Probability and stats including describing sorting algorithms then assessing their Big O time complexity. After interview never heard anything back.

Recruiter call, followed by OA, followed by round with 2 team members, followed by another round with 3 team members. The recruiter call was standard. Subsequent rounds involved a modeling case study, resume deep-dive, probability/stats questions, and basic DSA