Front End Developer – UI (React/TypeScript)

JUXT; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

JUXT in London is looking for talented Front End Engineers to help modernise electronic trading applications by migrating legacy Angular and desktop technologies to high-performance React interfaces.

You will build real-time market data visualisations, collaborate with backend Java engineers, and contribute to reusable UI components, testing, and CI/CD pipelines in a fast-paced, agile environment.

Qualifications

• Strong React and TypeScript experience in building front-end applications.
• Experience delivering real-time market data visualisations and dashboards.
• Familiar with Agile development practices and collaboration with cross-functional teams.
• Experience migrating Angular/AngularJS to React in production environments.
• Proficiency with automated UI testing frameworks (Playwright, Cypress, Selenium).

Responsibilities

• Design, develop and maintain high-performance React and TypeScript applications.
• Build responsive UIs supporting pricing, execution and post-trade workflows.
• Consume real-time market data via WebSockets/RSocket and messaging systems.
• Develop reusable UI components and shared frameworks.
• Migrate legacy Angular applications to modern React architecture.
• Collaborate with backend Java engineers for end-to-end delivery.
• Implement automated UI tests and contribute to CI/CD pipelines.

Skills

React

TypeScript

Frontend architecture

Agile methodologies

Tools

Playwright

Cypress

Selenium

WebSockets

Kafka

ag-Grid

Job description

Our embedded engineering teams at JUXT work alongside client technology organisations, delivering modern software across electronic trading, capital markets and enterprise platforms.

We're looking for talented Front End Engineers to join our London embedded engineering team. You'll be working with a Tier 1 investment bank, helping modernise a suite of electronic trading applications by replacing legacy Angular and desktop technologies with high-performance React applications used by traders around the world.

The Role

As a Front End Engineer, you'll build mission-critical trading applications that process and visualise real-time market data for front-office users. Working as part of a collaborative engineering team, you'll help deliver modern React applications while contributing to shared engineering standards, reusable UI components and platform tooling.

The work combines modern front-end engineering with distributed systems, messaging technologies and performance optimisation, making it ideal for engineers who enjoy solving complex technical challenges.

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.
• 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.
• Strong commercial experience with React and TypeScript.
• Experience delivering complex production front-end applications.
• 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.
• Experience migrating Angular or AngularJS applications to React.
• Experience with Solace, Kafka, Tibco EMS, Aeron or similar messaging technologies.
• Knowledge of binary messaging formats including SBE, FlatBuffers or Protocol Buffers.
• Experience working with ag-Grid or enterprise-scale data grid frameworks.
• Financial Markets or Electronic Trading experience, particularly FX.
• Experience with RFQ, RFS, Order Management or Single Dealer Platforms.
• Knowledge of Kubernetes, OpenShift and containerised deployments.