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Citadel Securities

Prop / Market Maker · Multi-asset market maker / HFT · Miami, FL

A coding- and probability-heavy loop with a market-making game, the market-maker sibling of the Citadel hedge fund (a separate entity).

Difficulty: ●●●●●Recruits in India

Citadel Securities is a dominant multi-asset market maker in equities, options, and FICC. Note it is a distinct entity from Citadel the hedge fund, though interview reports often blur the two.

Expect escalating probability (Bayes, urns, random walks), a market-making trading game, and, for engineers, genuine low-latency systems depth.

Roles they hire

Quant Trader · Quant Researcher · Software Engineer · Quant Developer

Interview processas publicly reported

  1. 1

    Online assessment

    HackerRank-style, combining coding with probability/quant and market questions.

  2. 2

    Technical phone screen

    ~60 min, 2–3 problems mixing brainteasers, EV, and trading scenarios with verbal reasoning.

  3. 3

    Superday

    ~5–7 rounds: escalating probability/quant, a market-making game (quote, manage inventory, update on info); for SWE, coding (order books, market data) + low-latency system design.

  4. 4

    Behavioral

    Hiring-manager conversations.

What they test

Probability →Coding →Market Making →Mental Math →

Prep tips

  • ▸Master the market-making game, spreads tight enough to keep EV but wide enough not to get picked off, plus fast EV/Bayes.
  • ▸For dev/SWE, be strong in coding and low-latency reasoning (order books, lock-free concepts), not just LeetCode.

India recruiting

Office in Gurugram (Two Horizon Center) plus a publicized IIT Bombay–Citadel Securities Quantitative Research Lab and a 'Discover' program; recruits actively from top IITs.

Sources

Interview processes change and vary by role, office, and year. This guide reflects publicly reported experiences and is not affiliated with Citadel Securities.

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