Companies Citadel Securities

Citadel Securities

Miami, Florida, USA

Total Offices: 14

1,900 Total Employees

Year Founded: 2002

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Engineering 55 Data & Analytics 36 AI & Machine Learning 11 Research 9 Finance 8 HR & Recruiting 7 Consulting 4 Product Management 3 Operations & Support 1 Sales 1

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Articles about Citadel Securities

Featured Articles

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

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.

Ellen Glover

Updated on October 17, 2025

22 Engineering Companies in Singapore to Know

Singapore is a hub for some of the top engineering companies in the world.

All Articles

Olivia McClure

Updated 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.

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.

Cathleen Draper

Updated on April 08, 2025

Take Note: 21 Chicago Companies to Watch This Fall

From fast-growing startups to established firms with hefty benefits, here’s a rundown of Chicago’s most noteworthy people-first organizations to keep an eye on.

Brigid Hogan

Updated on April 23, 2024

Summer Tech Watch: 26 National Enterprises to Know

As summer is heating up, so too is the nation’s tech scene. Check out 26 enterprises that reward their employees with standout perks and benefits.

Brand Studio

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.

Ellen Glover

Updated on October 17, 2025

22 Engineering Companies in Singapore to Know

Singapore is a hub for some of the top engineering companies in the world.

Ellen Glover

Updated on January 13, 2025

20 IT Companies in Singapore to Know

These top IT companies have offices in Singapore.

Recently posted jobs

See all jobs at Citadel Securities

Citadel Securities

Crypto Quantitative Developer

18 Hours AgoSaved

In-Office

New York, NY, USA

Information Technology • Software • Financial Services

Build and optimize low-latency, high-performance C++ trading systems for crypto markets. Partner with researchers and traders to productionize strategies, improve pricing, risk, and execution logic, optimize latency/throughput, analyze large market/trade data, and ensure resilient, well-tested, scalable systems across venues.

Citadel Securities

Crypto Quantitative Developer

18 Hours AgoSaved

In-Office

London, Greater London, England, GBR

Information Technology • Software • Financial Services

Build and optimize low-latency, high-performance C++ trading systems for crypto markets; partner with researchers and traders to productionize strategies; optimize latency, throughput, reliability; implement pricing, risk, and execution logic; analyze large-scale market and trade data; ensure resilience, testing, and scalability across global venues.

Citadel Securities