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UI Engineer- Global Trading Applications

Citadel Securities
🇺🇸New YorkMediorFull-time$175k–$350kPosted June 10, 2026

About the Role

Citadel Securities is building the next generation of trading and control platforms that power global markets. This UI Engineer role will support one of two major firmwide initiatives: Control Center or CitSec OMS—platforms that strengthen internal control frameworks, modernize trading workflows, and consolidate complex systems into seamless, high-performance user experiences.

You will work directly with traders, business control, surveillance, regulatory operations, and backend engineering teams to design and deliver scalable, real-time applications used across the firm.

  • 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

Responsibilities

  • 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

Requirements

  • 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

What You'll Get

  • $175k–$350k base salary
  • Medical and life insurance
  • Retirement and tax-free savings plans
  • Access to other healthcare programs
  • Discretionary incentive compensation program