Salary: £65,000 - 105,000 per year
Requirements:
Strong commercial experience developing applications with React and TypeScript
Excellent JavaScript, HTML and CSS fundamentals, including responsive and accessible design
Experience building secure applications and integrating frontend services with APIs
Strong testing experience, ideally including Jest and React Testing Library
Comfortable working with Git-based development, CI/CD and modern engineering practices
Experience within consultancy, government, law enforcement or similarly complex environments is particularly valuable
Exposure to technologies such as Entra ID, MSAL, Keycloak, Redux, React Router, Tailwind CSS, Docker, GitHub Actions or data visualisation is useful
Eligible for UK Security Clearance
Responsibilities:
Design and build modern web applications using React, TypeScript and JavaScript
Develop dashboards, data-rich interfaces and intuitive user journeys for complex operational environments
Work directly with technical and non-technical stakeholders to understand requirements and shape practical solutions
Integrate applications with REST APIs, authentication services and wider enterprise platforms
Produce prototypes and proof-of-concepts to test ideas and support consultancy engagements
Contribute to testing, code reviews, CI/CD and engineering standards across delivery teams
Technologies:
CI/CD
CSS
Docker
Frontend
Git
GitHub
Support
JavaScript
Jest
REST
React
Redux
Security
TypeScript
Web
Java
More:
We are a growing technology consultancy delivering digital transformation programmes across law enforcement, public safety and wider government. Youll work alongside consultants, architects and engineers, contributing from early discovery and prototyping through to secure, production-ready applications. Our work is varied and user-focused, addressing challenges where accessibility, security and effective use of information are critical. Developers have genuine influence over the solutions we deliver, with hands-on engineering experience and exposure to strategy, discovery and digital challenges across the public sector.
last updated 40 week of 2026
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JavaScript Developer in London employer: Ncounter Limited
Ncounter is an exceptional employer for those seeking to make a significant impact in the public sector through digital transformation. With a hybrid work model that promotes flexibility and occasional client travel, employees benefit from a collaborative culture that values diverse experiences and encourages professional growth. The company offers clear pathways for advancement, ensuring that consultants can take ownership of their engagements while contributing to meaningful change in complex environments.
