Citadel·Quantitative Researcher

Citadel Quantitative Researcher interview experience

No offer

Hard

Positive

United KingdomPosted Sep 2025 · Candidate report, summarized by Dataford

My interview started immediately with a technical task: I was asked to build a random forest model, and then explain something deeper about correlation between variables—specifically how correlation affects feature importance and how you’d interpret the model.

It wasn’t enough to name concepts; I had to be able to connect them.

In another similar quantitative setup, the conversation began at a high level with discussion of my prior research experience. After that, I moved into modeling assumptions and methods, and then the interview added finance questions like deriving Sharpe ratios. Across both experiences, it felt like the team was looking for people who could jump between statistical intuition, modeling reasoning, and finance context without losing clarity.

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