UI Engineer- Global Trading Applications

Job Description

• Design and build complex, workflow-driven user interfaces using TypeScript and React
• Develop scalable front-end architecture for large-scale trading and control systems
• Integrate UI components with backend services written in C++, Python, and real-time data systems (e.g., KDB+/Q)
• Translate sophisticated trading and compliance workflows into intuitive, high-performance user experiences
• Drive performance optimization, maintainability, and architectural consistency across applications
• Collaborate closely with cross-functional stakeholders to deliver business-critical enhancements

• Strong expertise in TypeScript and React
• Expertise building and maintaining tooling for TypeScript projects (e.g., build systems, testing frameworks, developer workflows)
• Experience building large-scale, production-grade front-end applications
• Deep understanding of UI architecture, state management, and performance optimization
• Experience integrating with distributed or real-time backend systems
• Product-oriented mindset: able to work directly with business users, gather requirements, and deliver practical, scalable solutions
• UX expertise: experience designing intuitive applications that distill complex, real-time data into clear, actionable user experiences, with a strong focus on user productivity
• Ability to operate effectively in environments without dedicated UI design support
• Strong communication skills and ability to work directly with business users
• Experience in financial services, trading systems, or complex workflow platforms is a plus

• Build systems used directly by trading and control teams in global markets
• Work on high-impact platforms that modernize and consolidate critical workflows
• Collaborate with top-tier engineers and business stakeholders
• Solve technically challenging problems in real-time, high-performance environments

In addition, the employee who fills this role will be eligible to participate in a discretionary incentive compensation program, as well as a wide array of benefit programs, such as medical and life insurance, retirement and tax-free savings plans, and access to other healthcare programs.

About Citadel Securities

Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market’s and our clients’ most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com.