Front End Engineer

Location: New York

Front End Engineer About Millennium Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team 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.What

You'll DoDesign, 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 Web Sockets 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 Web Socket APIs, as well as Web Assembly-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

What You Bring Bachelor’s degree in Computer Science or a related field5+ years of professional experience building web applications with JavaScript/TypeScript5+ 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 (Web Sockets, 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

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

Good communication skills and ability to collaborate directly with non-technical stakeholders

Our tech stack

Front-end:
React 18, Type Script, AG Grid, Ant Design, Web Sockets, WASMBack-end:
Node.js, Java Spring Boot (used to bundle/serve the front-end — familiarity is a plus, not required), Rust Data: MS SQL, Elasticsearch Security/Auth:
Kerberos, JWTSalary Range Millennium offers a total compensation package which includes a base salary, discretionary performance bonus, and comprehensive benefits. The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future. When finalizing an offer, we take into consideration an individual’s experience level and the qualifications they bring to the role to formulate a competitive total compensation package.

Recruiter:

Eric Enlow Hiring Manager:

Dennis HoDepartment:

Information Technology