Front End Engineer

Millennium•New York, NY

2d•$175,000 - $250,000•Onsite

About The Position

The Information Technology department is core to the health and growth of Millennium’s business. The firm’s active, multi-manager model demands flexible, scalable technology and advanced proprietary systems, including the development of next-generation analytical and trading capabilities. This team partners closely across product, quantitative, and engineering functions to deliver high-performance technology that supports real-time decision-making in fast-moving trading environments. We are looking for a Front-End Developer to build and maintain high-performance, low-latency user interfaces for trading applications. You will work closely with UI engineers, algorithmic developers, product, quantitative, and backend engineering teams to deliver real-time data visualizations, workflows, and dashboards that support trading and risk management. This role is ideal for an experienced React engineer who cares deeply about performance, reliability, and clean UX.

Requirements

Bachelor’s degree in Computer Science or a related field
5+ years of professional experience building web applications with JavaScript/TypeScript
5+ years with React in production, including substantial experience with hooks, functional components, and modern patterns
Strong knowledge of modern JavaScript (ES6+), HTML5, and CSS3
Experience with real-time data UIs (tables, charts, dashboards) and (WebSockets, SSE, or similar streaming technologies)
Experience with state management (e.g., Redux, Zustand, or similar)
Ability to leverage LLM-assisted tools (e.g., code assistants) effectively in the development workflow
Good communication skills and ability to collaborate directly with non-technical stakeholders

Nice To Haves

Experience in fixed-income capital markets or other capital markets, specifically with concepts such as positions, P&L, risk metrics, and market data is a plus

Responsibilities

Design, build, and maintain React-based user interfaces that power core trading application workflows
Implement real-time data visualizations for orders, prices, positions, and other key metrics using streaming technologies such as WebSockets
Turn product requirements and stakeholder feedback into intuitive, efficient, and scalable user experiences, rapidly prototyping and iterating on new features
Optimize front-end performance, responsiveness, and reliability across complex, data-intensive screens
Partner with backend engineers to integrate REST and WebSocket APIs, as well as WebAssembly-based components
Write clean, testable, well-structured code supported by unit and integration tests
Provide best practices around code reviews, front-end architecture decisions, and developer-level production support for the front-end components
Prototype, iterate, and support front-end components in production to ensure a high-quality user experience