Citadel Securities Quantitative Trader interview experience

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Hard

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Chicago, ILPosted May 2022 · Candidate report, summarized by Dataford

I went through a multi-round process that felt like it ramped up quickly.

After an initial phone conversation with quantitative questions, I moved into the heavier rounds where I had several back-to-back interviewers, including different styles ranging from IMO-style math to more programmatic, applied problem solving.

Across the full onsite sequence, the questions stayed algorithmic and mathematical rather than purely trading-theory. One of the strongest recurring themes was probability and statistics math, along with algorithm questions that leaned into dynamic programming. Even when the interviewers were friendly and genuinely interested, the difficulty was

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