Front End Developer – UI (React/TypeScript)

October 22, 2026

Hybrid

Senior

London, United Kingdom

Description

Embedded engineering teams work alongside client technology organisations, delivering modern software across electronic trading, capital markets and enterprise platforms. The Front End Engineer joins the London embedded team to help a Tier 1 investment bank modernise a suite of electronic trading applications, replacing legacy Angular and desktop technologies with high-performance React applications used by traders around the world. The work combines front-end engineering with distributed systems, messaging technologies and performance optimisation of real-time market data interfaces for front-office users.

Responsibilities

Design, develop and maintain high-performance React and TypeScript applications
Build responsive user interfaces supporting pricing, execution and post-trade workflows
Consume and process real-time market data using WebSockets, RSocket and messaging technologies
Optimise browser rendering, memory usage and application performance for large streaming datasets
Develop reusable UI components and shared application frameworks
Migrate legacy Angular and AngularJS applications onto modern React architecture
Collaborate closely with backend Java engineers to deliver end-to-end solutions
Build automated UI testing using Playwright, Cypress or similar frameworks
Contribute to architecture, code reviews and engineering best practices
Deploy applications through modern CI/CD pipelines into containerised production environments

Requirements

Strong commercial experience with React and TypeScript
Experience delivering complex production front-end applications
Excellent understanding of browser rendering, performance profiling, memory management and optimisation
Experience consuming real-time streaming data using WebSockets, RSocket or similar technologies
Strong understanding of asynchronous programming and responsive UI design
Comfortable understanding backend Java services and collaborating across the full technology stack
Experience with automated testing frameworks including Playwright, Cypress or Selenium
Excellent software engineering fundamentals and Agile development experience
Desirable: experience migrating Angular or AngularJS applications to React
Desirable: experience with Solace, Kafka, Tibco EMS, Aeron or similar messaging technologies
Desirable: knowledge of binary messaging formats including SBE, FlatBuffers or Protocol Buffers
Desirable: experience working with ag-Grid or enterprise-scale data grid frameworks
Desirable: Financial Markets or Electronic Trading experience, particularly FX
Desirable: experience with RFQ, RFS, Order Management or Single Dealer Platforms
Desirable: knowledge of Kubernetes, OpenShift and containerised deployments