UX Engineer TypeScript React - FinTech

Client Server Limited; Greater London; Hybrid; GBP 54,000 - 66,000; Full time

Benefits offered by this job

Private Medical Healthcare

Pension

Share Option scheme

Employee Wellness Programme

Summer time hours

£2k personalised training budget

Job summary

Client Server Limited seeks a UX Engineer / Developer (TypeScript React) to deliver end-to-end frontend features for trading and risk management systems in London with hybrid WFH flexibility. Expect real-time data interfaces, complex grids, and AI-assisted development practices.

You will shape UI design, frontend architecture and data flows, partnering with design and backend teams to create high quality, scalable user experiences.

Qualifications

• Strong React and TypeScript development skills with CSS/UI implementation.
• Experience with state management and data fetching using Zustand and TanStack Query.
• Experience writing clean, maintainable, testable code with automated testing using Vitest and Playwright.
• Experience integrating REST APIs and API contracts, ideally using OpenAPI specifications.
• Eye for detail and usability, visual consistency and high quality UX.
• Hands‑on experience with AI assisted development tools and agentic workflows.
• Strong problem solving, proactive approach and ability to own work independently.
• Degree in Computer Science or a similar technical discipline.

Responsibilities

• Deliver end-to-end frontend features across order management and risk management systems.
• Collaborate with backend engineers and other teams to implement full-stack functionality.
• Contribute to the evolution of a scalable frontend monorepo and frontend architecture.
• Develop real-time market data visualisations and high-performance data grids.
• Engage with AI tooling to improve development efficiency and consistency.

Skills

React

TypeScript

CSS UI

Zustand

TanStack Query

Vitest

Playwright

OpenAPI / REST APIs

AI assisted development

Problem solving

Education

Computer Science or similar degree

Tools

OpenAPI specifications

REST API integration

Job description

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 will 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
• Share Option scheme
• Employee Wellness Programme
• Summer time hours
• £2k personalised training budget