Senior Frontend/UI Software Engineer (Quant Trading)

NJF Global Holdings Ltd; New York (NY); On-site; USD 400,000 - 750,000; Full time

Job summary

NJF Global Holdings Ltd seeks a Senior Frontend/UI Software Engineer to build high-performance web applications that directly support trading and research workflows in New York. You will architect new applications, redesign existing systems, and collaborate with researchers, quantitative developers, and platform engineers to deliver end-to-end technical solutions.

The role emphasizes solving complex technical challenges, enabling reliable, scalable web platforms, and contributing to firm-wide

Qualifications

• 5+ years of professional Frontend/UI engineering experience.
• Significant React + TypeScript experience from architecture to deployment.
• Experience with agentic AI coding tools (Claude Code).
• Exposure to deployment and infrastructure tools (Docker, Kubernetes).
• Strong communication and collaboration with senior stakeholders.

Responsibilities

• Build high-performance web apps supporting trading and research workflows.
• Architect and build new apps from scratch; redesign existing systems.
• Collaborate with cross-functional partners to deliver end-to-end technical solutions.
• Troubleshoot, optimize, and maintain critical app components for reliability and high availability.
• Contribute back to core platform and tooling used firm-wide.

Skills

React

TypeScript

Frontend Architecture

AI coding tools

Collaboration

Tools

Docker

Kubernetes

Job description

Senior Frontend/UI Software Engineer (Quant Trading)

Total compensation: ranging $400k-750k depending on performance and seniority

A leading quantitative trading firm is hiring a Senior Frontend/UI Software Engineer to join a small, highly skilled engineering group that partners directly with business areas across the firm to solve their most pressing technical challenges.

As part of Core Software, you'll build and optimize performant web applications that directly support trading and research workflows whilst working closely with researchers, quantitative developers, and platform engineers to architect solutions that are both technically elegant and business-critical.

The work spans building new applications from the ground up as well as tearing down and redesigning existing systems that no longer hold up.

What you'll do:

• Build high-performance web apps that directly support trading and research workflows
• Architect and build new applications from scratch, and redesign or rebuild existing systems where needed
• Collaborate with cross-functional partners to deliver end-to-end technical solutions
• Troubleshoot, optimize, and maintain critical application components for reliability and high availability
• Contribute back to core platform and tooling used firm-wide

What we're looking for:

• 5+ years of professional experience as a Frontend/UI Engineer or in a related technical role
• Significant experience building React applications with TypeScript, from architecture through deployment
• Experience working with agentic AI coding tools (e.g. Claude Code)
• Exposure to deployment and infrastructure tools (Docker, Kubernetes)
• Strong problem-solving skills and the ability to break complex technical problems into actionable items
• A collaborative, consultative approach - comfortable dropping into a challenge, delivering, and moving to the next
• Strong written and oral communication skills; confident engaging senior stakeholders and the business

This is a rare opportunity to work at the intersection of engineering and the trading floor, with direct visibility into how your work drives business outcomes at a leading quant tradinf firm.