UI Front End Engineer- Trading Applications

Phaxis; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

Phaxis is seeking a front-end focused React engineer in New York to join a financial firm building a next-generation trading platform. You will build from scratch, delivering high-performance UI components and a scalable front-end architecture using TypeScript and React for complex workflows.

You will integrate with backend services written in .NET and real-time data systems, translate trading and compliance workflows into intuitive interfaces, and drive performance, maintainability, and

Qualifications

• Strong expertise in TypeScript and React.
• Experience building large-scale front-end applications.
• Deep understanding of UI architecture and performance.
• Experience integrating with distributed or real-time backends.
• Product-oriented mindset with ability to gather requirements.
• Financial services/trading systems experience preferred.

Responsibilities

• Design and build complex, workflow-driven interfaces.
• Develop scalable front-end architecture.
• Integrate UI with .NET backend and real-time data.
• Translate trading workflows into intuitive experiences.
• Drive performance, maintainability, and architecture.
• Collaborate with cross-functional stakeholders to deliver enhancements.

Skills

TypeScript

React

UI architecture

State management

Real-time data integration

Frontend scalability

Back-end integration ( .NET )

Performance optimization

Business stakeholder collaboration

Job description

Our client, a financial firm building a next generation trading platform is looking for a Front End centric React Engineer to join the team in New York. You will be building from scratch. If that type of position interests you, this is your role.

Responsibilities

• Design and build complex, workflow-driven user interfaces using TypeScript and React
• Develop scalable front-end architecture for large-scale trading systems
• Integrate UI components with backend services written mainly in .NET and real-time data systems
• 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
• 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
• Experience designing applications that turn complex, real-time data into clear, actionable user experiences, with a strong focus on user productivity
• Ability to operate effectively in start-up type of environments without dedicated UI design support
• Experience in financial services and trading systems