Senior Fullstack Engineer - Fixed Income

Robert Walters; City Of London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading recruitment agency in the UK is seeking an experienced Full-Stack Engineer to architect and deliver high-performance, real-time React applications supporting trading workflows. The ideal candidate will have strong expertise in React and TypeScript, proven experience in real-time systems, and a solid backend development background, ideally with Java. This role offers the opportunity to shape a scalable technology platform.

Qualifications

• Strong expertise in React, TypeScript, and modern web technologies.
• Proven experience building real-time, event-driven systems.
• Solid background in backend development, ideally with Java.

Responsibilities

• Design and develop modern, real-time React/Java applications for trading workflows.
• Work closely with engineers to build robust, scalable, and low-latency systems.
• Lead full-stack solution design with a focus on backend performance.

Skills

React

TypeScript

WebSockets

REST APIs

Java

Job description

An exciting opportunity for an experienced Full-Stack Engineer to help transform a major Fixed Income front-office technology landscape. You'll architect and deliver high-performance, real-time React applications that support trading workflows, working closely with stakeholders to shape a scalable, future‑ready platform.

Key Responsibilities

• Design and develop modern, real‑time React/Java applications for trading workflows
• Work closely with engineers to build robust, scalable, and low‑latency systems
• Lead full‑stack solution design, with a focus on backend performance, reliability, and system integration
• Translate business and technical requirements into cohesive system architectures
• Promote engineering excellence, modern development practices, and continuous improvement
• Contribute to platform modernisation, helping define long‑term technology direction

Key Requirements

• Strong expertise in React, TypeScript, and modern web technologies
• Proven experience building real‑time, event‑driven systems (WebSockets, Web Workers, asynchronous data flow)
• Solid background in backend development, ideally with Java, REST APIs, and messaging frameworks
• Deep understanding of architecture and system design, including distributed and low‑latency systems
• Ability to drive full‑stack solutions, with a strong backend focus and solid UI fundamentals
• Demonstrated experience within a Rates or broader Fixed Income trading environment
• Strong appreciation for system‑level design and how individual applications fit within the wider platform
• Capable of working with abstract or evolving requirements to deliver practical, scalable solutions