Companies Citadel Securities

Citadel Securities

Miami

Total Offices: 14

1,900 Total Employees

Year Founded: 2002

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Engineering 23 Data & Analytics 14 Finance 5 AI & Machine Learning 3 Consulting 2 HR & Recruiting 2 Operations & Support 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 April 29, 2026

23 Engineering Companies in Singapore to Know

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

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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.

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Ellen Glover

Updated on June 03, 2026

21 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

Deep Learning ML Researcher

21 Hours AgoSaved

In-Office

Miami, FL, USA

Information Technology • Software • Financial Services • Quantitative Trading

Conduct research and develop machine learning models for finance, focusing on deep learning and large language models, optimizing them for performance, and collaborating with teams to integrate ML solutions.

Citadel Securities

Quantitative Research Engineer

21 Hours AgoSaved

In-Office

Miami, FL, USA

Information Technology • Software • Financial Services • Quantitative Trading

Translate mathematical models into ultra-low latency implementations, optimize trading algorithms, and develop high-performance C++ systems for real-time trading.

Citadel Securities

UI Engineer (Contractor)

YesterdaySaved

In-Office

New York, NY, USA

Information Technology • Software • Financial Services • Quantitative Trading

Design, prototype, and build high-performance, real-time web applications and visualizations for investment professionals. Gather requirements, partner with traders and researchers, deliver scalable UIs, and improve platform workflows and performance.

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