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# Senior Java/React Full Stack Developer

- **Company:** Appvia
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £143,000.0 - £156,000.0
- **Contract:** Contract
- **Skills:** Java (Programming Language), Artificial Intelligence, Software Quality, Apache Maven, MongoDB, Extensible Markup Language (XML), ReactJS, Technical Debt, Gitlab, Kubernetes, Playwright, Front End Software Development, Domain Driven Design, Docker
- **Published:** September 10, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840576076-senior-javareact-full-stack-developer

## About the Role

You are an experienced hands-on Java/React developer and consultant who enjoys working on complex systems and influencing how software is built and evolved. You bring:

 * Strong experience with React and modern front-end development
 * Strong experience with Java backend development (Spring, Mongo)
 * A solid grounding in Domain Driven Design (DDD)
 * Experience working with microservice-based architectures
 * Full-stack awareness and the ability to collaborate across disciplines
 * Interest or experience in AI-assisted development to improve code quality and delivery speed
 * Confidence working directly with clients and guiding technical decisions

## Description

We are looking for a Senior Java/React Full Stack Developer to join Appvia on a contract basis, working as a hands-on engineering consultant within our Solutions Engineering team. This role focuses on modernising large, complex software systems, reducing technical debt, and improving delivery speed and reliability. You will work closely with client teams, alongside platform and test engineers, helping introduce modern development practices and AI-assisted engineering techniques to improve developer productivity. You will report to a Principal Software Engineer and play a key role in driving best practices within customer teams., * Design and deliver modern Java/React applications within complex systems

 * Improve development workflows, testing approaches, and developer productivity
 * Contribute to breaking down monolithic systems into well-defined services
 * Apply DDD principles to improve maintainability and system clarity
 * Collaborate with platform and test engineers to deliver end-to-end solutions
 * Support teams in adopting modern tooling and AI-assisted development practices
 * Act as a senior consultant within delivery teams, influencing best practices

Technical Skills

Core technologies:

 * Java / Spring
 * React
 * XML / HTML / CSS
 * Mongo DB
 * Playwright
 * Docker / Kubernetes
 * Maven
 * GitLab

Nice to have:

 * GovUK UI Framework


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