Citadel Securities·Quantitative Researcher

Citadel Securities Quantitative Researcher interview experience

No offer

Hard

Neutral

London, EnglandPosted Sep 2024 · Candidate report, summarized by Dataford

I went through a sequence that started with an online math test—roughly fifteen questions—where the problems were mostly probability and brainteasers.

That was followed by live interviews that felt very “quant interview” in style: quick transitions between technical questions and a bit of behavioral/follow-up discussion. I remember one round including market-making style questions, and the conversation also involved probability questions beyond the basic setup.

On the next stage, I had a call connected to my background and then got pushed into more structured technical material. Markov chains and counting showed up as key topics, and I had to talk through how I was reasoning rather than just state formulas. In another technical

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