UX Engineer TypeScript React - FinTech

Client Server Limited; Greater London; Hybrid; GBP 50,000 - 60,000; Full time

Benefits offered by this job

Private Medical Healthcare incl.Dental

Pension

Employee Wellness Programme

Training budget

Summer time hours

Job summary

Client Server Limited is seeking a UX Engineer / Developer in London with strong React and TypeScript skills to build intuitive, data-rich frontends. You will work on real-time market data interfaces and risk management UIs, collaborating with design and backend teams to ensure a scalable frontend architecture.

You will join a tech-driven finance environment, using AI-assisted development and modern tooling to deliver high-quality experiences across order and risk systems.

Qualifications

• Strong React and TypeScript development skills with excellent CSS/UI implementation.
• Experience with state management and data fetching libraries (Zustand, TanStack Query).
• Experience writing clean, maintainable, testable code with Vitest and Playwright.
• Experience integrating REST APIs and OpenAPI specifications.
• Attention to detail and passion for usability, visual consistency, high quality UX.
• Hands-on experience with AI-assisted development tools and agentic workflows.
• Proactive, able to take ownership of work independently.

Responsibilities

• Deliver end-to-end frontend features across front-to-back systems (order and risk management).
• Collaborate with design and backend teams to improve UI design principles and frontend architecture.
• Develop real-time interfaces, data visualisations and high-performance data grids.
• Establish WebSocket communications and improve state/data management in a frontend monorepo.
• Leverage AI tools to improve development efficiency and integrations with Figma and MCP.

Skills

React

TypeScript

CSS/UI

State management

Zustand

TanStack Query

Vitest

Playwright

OpenAPI

AI assisted development

Problem solving

Education

Bachelor's degree in Computer Science or similar

Tools

Zustand

TanStack Query

Vitest

Playwright

OpenAPI

Figma

MCP

Job description

London, Greater London | £50k - £60k per year

UX Engineer / Developer (TypeScript React) London / WFH to £60k

Are you a UX Engineer who combines strong frontend engineering skills with a passion for building intuitive, high performance user experiences?

You could be joining a technology driven financial markets business where you'll shape the user experience across sophisticated trading and risk management applications. You'll work across design and engineering, improving usability and consistency while building responsive, data rich interfaces that help users make decisions in real time.

As a UX Engineer, you'll deliver end-to-end frontend features across order management and risk management systems, working closely with backend engineers and other teams on functionality spanning the full stack. You'll have genuine influence over UI design principles, frontend architecture and the tools used to build and maintain a consistent product experience.

Using React and TypeScript, you'll develop intuitive interfaces, real-time market data visualisations and high performance, spreadsheet like data grids. You'll help establish WebSocket based communication between frontend and backend services, improve state and data management and contribute to the evolution of a scalable frontend monorepo. You'll also use frontend monitoring and session replay to understand real user behaviour, investigate issues and continuously improve the experience.

AI assisted development is an important part of the engineering culture. You'll use AI tools thoughtfully, taking ownership of the code they produce, while exploring agentic workflows, design-to-code automation and integrations with tools such as Figma and MCP to make frontend development more efficient and consistent.

Location / WFH:

You'll join the team in Central London three days a week with flexibility to work from home the other two days.

About you:

• You have strong React and TypeScript development skills, with excellent CSS and UI implementation skills
• You have experience with state management and data fetching libraries such as Zustand and TanStack Query
• You have experience of writing clean, maintainable, testable code, with automated testing experience using tools such as Vitest and Playwright
• You have experience integrating REST APIs and working with API contracts, ideally using OpenAPI specifications
• You have an eye for detail and a genuine interest in usability, visual consistency and high quality user experiences
• You have hands-on experience using AI assisted development tools, with an interest in agentic workflows and tool integrations
• You have strong problem solving skills, a proactive approach and the ability to take ownership of work independently
• You're degree educated in Computer Science or similar technical discipline

What's in it for you:

As a UX Engineer / Developer you will receive a comprehensive package including:

• Salary to £60k + bonus (c20%)
• Private Medical Healthcare including Dental and Vision cover
• Pension
• Employee Wellness Programme
• Summer time hours
• £2k personalised training budget