UI Engineer
Full time
Perm
Onsite 5 days a week - Midtown East
$230K base salary + $200K bonus, can go higher!
Citadel Securities is building the next generation of trading and control platforms that power global markets. We are seeking a UI Engineer to join our Global Trading Applications team in New York.
This 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.
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
Qualifications
- 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
Why Join Us
- 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