Quantitative Trading / Finance

Citadel Securities

Market-making and quantitative trading firm operating across global markets.

Recommended FreeCareerPath preparation

Curated by FreeCareerPath, not a claim about what Citadel Securities specifically asks — real roadmaps, lessons, and mock interviews relevant to this kind of role.

Coding

Foundations
From zero to a small, finished project you can talk about.
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Quant Developer Interview Prep
Implementation-first quant interview prep.
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Thread-Safe Counter
Build the Primitive
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Behavioral

The STAR method, and why interviewers actually use it
Interviews · Behavioral interviews
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Answering 'Tell me about yourself' without rambling
Interviews · Behavioral interviews
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Talking about failure without sabotaging yourself
Interviews · Behavioral interviews
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Questions to ask your interviewer
Interviews · Behavioral interviews
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Projects

What makes a project portfolio-worthy (and what doesn't)
Projects · Picking a project worth building
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Spec: a command-line tool that automates something you actually do
Projects · Project specs to build
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Spec: a small full-stack app with real persistence and auth
Projects · Project specs to build
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Spec: a README and demo that make your project legible to a stranger
Projects · Project specs to build
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