UI Engineer – CES Client Platforms
Citadel SecuritiesAbout the Role
Citadel Securities is building the next generation of client platforms that power institutional access to global markets. The CES Client Platforms team develops the applications and user experiences that enable clients to interact with Citadel Securities' electronic trading and execution services, building modern, high-performance platforms that deliver real-time market intelligence, execution capabilities, analytics, and workflow tools across asset classes.
- Design and build sophisticated, workflow-driven user interfaces primarily using TypeScript and React
- Dive into backend services (C++, Python) and data pipelines as needed to troubleshoot, optimize, or build out end-to-end features
- Integrate UI components with distributed backend systems and real-time data services, understanding the full lifecycle of the data
- Translate complex trading, market data, and client workflows into intuitive, high-performance user experiences
- Drive front-end engineering best practices, performance optimization, maintainability, and architectural consistency
- Collaborate closely with cross-functional engineering, product, and business teams to deliver client-facing capabilities and enhancements
- Contribute to the evolution of reusable UI frameworks, component libraries, and developer tooling
The role partners closely with product managers, client-facing business teams, quantitative researchers, and backend engineering teams; while the primary focus is crafting exceptional UI/UX, the team is looking for a well-rounded engineer with a strong desire to understand systems front-to-back.
Responsibilities
- Design and build sophisticated, workflow-driven user interfaces primarily using TypeScript and React
- Dive into backend services (C++, Python) and data pipelines as needed to troubleshoot, optimize, or build out end-to-end features
- Integrate UI components with distributed backend systems and real-time data services, understanding the full lifecycle of the data
- Translate complex trading, market data, and client workflows into intuitive, high-performance user experiences
- Drive front-end engineering best practices, performance optimization, maintainability, and architectural consistency
- Collaborate closely with cross-functional engineering, product, and business teams to deliver client-facing capabilities and enhancements
- Contribute to the evolution of reusable UI frameworks, component libraries, and developer tooling
Requirements
- Exceptional analytical skills and a natural curiosity to understand how complex, distributed systems work from the backend to the user interface
- Proficiency in TypeScript and React, with a solid foundation in modern web development
- A well-rounded, adaptable engineering mindset with the flexibility and willingness to contribute across the full stack when necessary
- Experience building front-end applications, with a strong appetite for scaling your skills and tackling large-scale, production-grade challenges
- Understanding of UI architecture, state management, and rendering performance
- Product-oriented mindset with the ability to work closely with stakeholders to understand requirements and deliver scalable solutions
- Strong UX instincts with experience designing applications that simplify complex workflows and present real-time information clearly and efficiently
- Ability to operate effectively in environments without dedicated UI design support
- Strong communication and collaboration skills
- Experience in financial services, electronic trading, market data, or other high-performance software environments is a plus, but not required
What You'll Get
- $175k–$350k base salary
- Medical and life insurance
- Retirement and tax-free savings plans
- Access to other healthcare programs
- Participate in a discretionary incentive compensation program