Citadel·Quantitative Researcher

Citadel Quantitative Researcher interview experience

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Candidate report, summarized by Dataford

I went through a pretty structured, four-round loop that felt technical from start to finish.

Each round was about 45 minutes. The first round kicked off without any resume walkthrough—just live coding and math. I was given an nxp matrix and asked to run OLS regression by treating each column as a target, then reason about the time complexity as part of the solution.

After that, the second round combined a resume deep dive with more coding and probability. I remember working through a grid problem about counting islands, then getting hit with a probability question tied to stock returns. The third round felt like it leaned harder into memory and systems thinking: we reviewed my

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