Citadel Securities·Quantitative Researcher

Citadel Securities Quantitative Researcher interview experience

No offer

Hard

Positive

London, EnglandPosted Dec 2021 · Candidate report, summarized by Dataford

I started with an interview that was very coding-forward, reflecting the low-latency flavor of the team.

The first conversation was essentially live coding where the interviewer could see my code as I wrote it. The focus was on problem solving and brainteasers, and I had to be careful about how I structured my approach, not just whether the final output was correct.

In another part of the process I experienced a similar “think under scrutiny” style where the coding discussion dug into edge cases and implementation details—down to how certain language and standard-library behaviors work. That felt like it was less about rewarding creativity and more about exposing whether I truly understood the

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