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Citadel (hedge fund)

Buy-side · Multi-strategy hedge fund · Miami, FL

Among the hardest quant interviews, open-ended probability where you must state assumptions, plus clean Python under a timer.

Difficulty: ●●●●●

Citadel is a multi-strategy hedge fund with dedicated quant research (distinct from Citadel Securities, the market maker). The bar is very high and the rounds are almost purely technical.

Probability questions are open-ended: they probe assumptions, multi-step logic, and edge cases rather than a single clean answer.

Roles they hire

Quant Researcher · Quant Trader · Software Engineer · Quant Developer

Interview processas publicly reported

  1. 1

    Online assessment

    Timed HackerRank-style Python coding plus probability/statistics.

  2. 2

    Technical screens

    45–60 min: programming, DS&A, research ability, problem-solving.

  3. 3

    Technical rounds

    Open-ended probability/stats (distributions, hypothesis testing, CIs, Bayesian, stochastic processes) emphasizing assumptions and edge cases.

  4. 4

    Super Day

    Several back-to-back interviews on technical depth and fit; ~4–6 rounds over ~4–10 weeks.

What they test

Probability →Statistics →Coding →Brainteasers →

Prep tips

  • ▸Drill open-ended probability where you must state assumptions explicitly before solving.
  • ▸Be equally strong on clean, correct Python under a timer.

India recruiting

The large Gurugram office and IIT Bombay lab belong to Citadel Securities (the market maker), a separate entity. The hedge fund recruits internationally and draws Indian talent but has no confirmed large India-based quant-research office.

Sources

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

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