It was very collaborative in that they started off by asking me to say what I knew about a data structure and then I basically had to implement one. I would look at Design tagged questions on LeetCode, and make sure you understand how things work under the hood.

Recruiter reached out, then a 2-3 hour OA. After that was a 1 hour technical interview to design a queue using a circular buffer. Final round was 2 1 hour technicals. One was leetcode that was medium difficulty but more coding/ design based than leetcode normally is. Second was a system design interview that was exchange related and pretty chill. Heard they hire to fire (50%!) so glad I didn't get it.