Citadel Securities

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

Articles about Citadel Securities

Featured Articles

Photo: Citadel Securities
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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In-Office
New York, NY, USA
Information Technology • Software • Financial Services • Quantitative Trading
Build high-performance, workflow-driven client interfaces for institutional electronic trading platforms using TypeScript and React. Integrate front-end applications with C++, Python, distributed backend services, real-time data, and data pipelines. Translate complex trading and market-data workflows into intuitive experiences, optimize performance, establish UI engineering best practices, and contribute to reusable frameworks, component libraries, and developer tooling while collaborating with product, business, quantitative research, and engineering teams.
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.
Information Technology • Software • Financial Services • Quantitative Trading
Develop and evolve investor-facing equities products using React and TypeScript. Partner with investors, product managers, UX designers, and engineering teams to understand workflows, prototype solutions, and deliver high-performance, data-intensive interfaces for research, risk analytics, portfolio analysis, and investment decisions. Own products end to end, from identifying user needs through launch and iteration, while maintaining high standards for quality, testing, performance, and maintainability.