Senior Frontend Engineer - React/TypeScript for Government

Ncounter Limited; Greater London; On-site; GBP 65,000 - 105,000; Full time

Job summary

Ncounter Limited in the United Kingdom is seeking an experienced frontend developer to build modern web apps with React and TypeScript, taking features from UI components to service integration. You will craft accessible, responsive interfaces, connect to REST APIs, contribute to testing and CI/CD, and collaborate with backend engineers and product teams on high‑profile public sector projects.

This hands-on role offers ownership across the frontend and opportunities for growth within a

Qualifications

• 5+ years of commercial frontend development experience with strong React and TypeScript expertise.
• Strong JavaScript, HTML and CSS fundamentals, ideally including Tailwind CSS or similar.
• Experience integrating REST APIs and building secure, production-grade applications.
• Jest and React Testing Library experience, alongside strong Git-based development practices.
• Experience building prototypes using Lovable or comparable tools.
• A good understanding of accessibility, responsive design and developing intuitive interfaces for varied user groups.
• Experience with Entra ID, MSAL, Keycloak, React Router, Redux, Vite, Radix UI/shadcn, data visualisation, Docker or GitHub Actions would be beneficial.
• Exposure to AI-enabled products is also useful, but this is fundamentally a frontend software engineering position rather than an AI specialist role.
• Candidates must be eligible for UK Security Clearance.

Responsibilities

• Build and maintain modern applications using React and TypeScript, taking features from component through to service integration.
• Develop accessible, responsive interfaces, dashboards and interactive user journeys.
• Integrate frontend applications with REST APIs, authentication services and role-based access controls.
• Build polished prototypes to demonstrate new concepts and help shape requirements with stakeholders.
• Contribute to testing, code reviews, CI/CD and frontend engineering standards.

Skills

React

TypeScript

JavaScript

REST APIs

Jest

Testing Library

Git

Lovable

Accessibility

Responsive design

Entra ID

MSAL

Keycloak

React Router

Redux

Vite

Radix UI

shadcn

Docker

GitHub Actions

Tools

AI

Backend

CI/CD

CSS

Docker

Frontend

Git

GitHub

JavaScript

Jest

Lovable

REST

React

Redux

Security

TypeScript

UX UI Design

Job description

Ncounter Limited in the United Kingdom is seeking an experienced frontend developer to build modern web apps with React and TypeScript, taking features from UI components to service integration. You will craft accessible, responsive interfaces, connect to REST APIs, contribute to testing and CI/CD, and collaborate with backend engineers and product teams on high‑profile public sector projects.

This hands-on role offers ownership across the frontend and opportunities for growth within a