Real, anonymous reports from people who interviewed for Quantitative Trader at Citadel Securities, newest first and distilled into what to expect across the loop.
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I started with an HR contact and then moved quickly into technical screening by phone. The early stages felt intense right away, and I was thrown into probability and statistics questions that were genuinely hard. In my case, the recruiter didn’t clearly frame which team I’d be interviewing for, which left me guessing about what emphasis to put on the way I answered.
After that first technical round, the process advanced fast rather than dragging on. One part that stood out was the sheer difficulty level: the questions weren’t just calculation-heavy, they required real judgment about how to approach the uncertainty. The time with the interviewer was short—around the 45-minute mark—so I felt like I had to make decisions quickly.
8 months ago
Average Positive New York, NY
After applying, I went through an online assessment and then two interview rounds with traders. Those sessions felt very probability-forward: general probability questions and market-making style games. The vibe was still pretty straightforward and “traditional quant,” but the games required thinking quickly about how to reason under uncertainty.
Not long after that, I headed to an onsite in the office. The format mixed a group game with multiple individual interviews, and the individual rounds kept leaning into statistics and probability. The game on the onsite felt conceptually similar to what I’d seen earlier, which was reassuring once I understood the style. Even though it was intense, the progression made sense as the day went on.
10 months ago
Difficult Negative London, England
My early process was pretty fast and felt focused. I had an introduction that led into technical questions with some brainteasers mixed in. One theme …
10 months ago
Average Positive New York, NY
My interview experience was heavily oriented around expected value, game-theory style reasoning, and market-making concepts. The first part felt less …
12 months ago
Difficult Neutral New York, NY
My process moved in stages. First there was a timed online assessment that covered probability, combinatorics, and a lot of mental-math and estimation…
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