Point72 Quantitative Software Developer interview questions

First round was a technical interview with a team member. Began with basic resume questions, Then proceeded to a basic algorithm + system scalability question. Start with a leetcode-style algorithm/data-structure question, finish by discussing how to scale/optimize it for a large system (focusing on time complexity/caching, not specific implementations). Interviewer was very friendly and supportive throughout the interview. Approximately leetcode medium.

Applied for a systematic branch of the fund: Cubist. First interview with PM, quite good, aligning on expectations from both sides. Then technical interview with dev. Very detailed, testing different areas - it was pretty good interview. Then I had an interview with Quant Researcher, 30 minutes grilling me on my background and why I was changing my jobs every two years, even the ones 10 years ago, 15 minutes of easy mathematical questions. The interviewer was very intimidating, even though he was asking rather easy questions. I failed after this interview. Just want to mention that PM had expectations me staying for 2-3 years.