Citadel Securities

HQ
Miami
Total Offices: 3
1,900 Total Employees
Year Founded: 2002

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Olivia McClure Olivia McClure
Published on September 25, 2025

How Citadel Securities' Early Careers Technology Program Unlocks Growth, Impact and Career Paths

Learn how the program at the market maker allows early-career technologists to jumpstart their professional growth journeys and make an immediate impact.

Olivia McClure Olivia McClure
Updated on December 31, 2025

Engineering the Future: Inside Citadel Securities’ Early Adoption of C++26

Technical Fellow Herb Sutter explains how the newest version of C++ is driving efficiency, reliability and resiliency in global trading.

Citadel
Cathleen Draper Cathleen Draper
Updated on April 10, 2025

32 NYC Companies to Watch This Spring

What makes these NYC tech companies stand out from the crowd? Built In NYC highlights the perks and culture of 32 flourishing companies this spring.

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4 Days AgoSaved
In-Office
2 Locations
Information Technology • Software • Financial Services • Quantitative Trading
As a PhD intern, you will develop and test trading strategies, perform statistical analysis, and collaborate with senior researchers.
Information Technology • Software • Financial Services • Quantitative Trading
Conduct quantitative research for automated trading strategies by developing mathematical models, translating algorithms into code, backtesting trading signals, analyzing unconventional data, and refining monetization systems. Collaborate with senior researchers during an 11-week post-doctoral internship while applying advanced probability, statistics, machine learning, and time-series techniques to financial markets.
9 Days AgoSaved
In-Office
2 Locations
Information Technology • Software • Financial Services • Quantitative Trading
Recruiting Coordinators support full-cycle recruitment processes, manage candidate interactions, and work on HR projects, all while building stakeholder relationships.