Citadel Securities Quantitative Trader interview experience

In one of the rounds, the interviewer was genuinely nice and helped me work through problems, which made it easier to keep momentum.

The later part of the process became heavier and more stressful. I eventually reached an onsite where the evaluation was still math and coding, but with open questions layered in. That shift—closed-form to more open-ended reasoning—was what tested me the most, and I found it hard to stay calm under the pressure.

I didn’t get an offer. Still, I felt like the process was consistent in its technical intent: they wanted depth, but they also tested whether I could