Citadel Interview Questions

Citadel's quant intern loop in 2026 covers probability, statistics, ML methodology, and coding under time pressure. Citadel's intern programs (Discover at Citadel for sophomores, Quant Intern for juniors) are highly competitive and serve as the primary new-grad pipeline. Conversion rates from internship to full-time are high for strong performers.

Citadel's new-grad quant research loop in 2026 is the most selective in the hedge-fund world, with a four to six round process emphasizing probability, statistics, time-series intuition, and the ability to translate noisy data into testable hypotheses. Citadel and Citadel Securities run separate loops despite shared infrastructure — confirm with your recruiter which org you are interviewing for.

Citadel's new-grad SWE loop in 2026 is highly competitive: HackerRank screen, multiple coding rounds, low-level systems questions, and a behavioral round emphasizing ownership and intellectual humility. Citadel and Citadel Securities have shared engineering recruiting but separate teams — confirm with your recruiter which org you are interviewing for.