Citadel Securities

About the Company

Citadel Securities is the next-generation capital markets firm. Our work is powered by the deepest integration of financial, mathematical and engineering expertise. Combining deep trading acumen with cutting-edge analytics and technology, we at Citadel Securities deliver critical liquidity to the world’s most important financial institutions—while helping shape the global markets of tomorrow.

Listed Jobs

Company Name

Citadel Securities

Job Title

Senior Options Software Engineer

Job Description

Role Overview:
Options market making presents a unique challenge in combining scale with business complexity. With over a million of listed options at the heart of billions of messages, we handle internet-scale datasets while being constrained on hardware due to latency requirements necessitating exchange co-location. This forces us to both push the machines to their max as well as innovate in the space of algorithms and business.
In our mission to be the most successful investment team in the world, we hire the brightest minds in technology, research, and finance, and empower them to collaborate. Treating the problems as “data-in, data-out” technical challenges is not enough. To succeed, you need to be willing to master the options trading domain and translate this mastery into cutting edge software solutions, collapsing data cardinality where possible.

Locations:
New York, Miami, London, Sydney

Responsibilities:
Build, maintain and support one of the world’s most powerful trading platforms while continuously improving performance, functionality and stability of the system
Design, develop, test, and deploy elegant software solutions across the firm
Partner with business leaders to define priorities and deliver custom solutions
Analyze complex business and technical problems
Make sound decisions proactively and in a self-directed manner
Provide timely systems support for trading activities

Qualifications:
5+ years of working experience
Experience working in C++
Experience working with distributed systems
Sound understanding of multi-threaded application design and development
Passion for technology and software development
Ambition to solve open-ended problems using analytical methods
Ability to work independently and prioritize high-impact projects
Strong communication and interpersonal skills applicable to a dynamic trading environment
Bachelor’s degree (or equivalent experience) in Computer Science or related field



Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.

London, United Kingdom

On site

14-04-2025