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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Developer - UK Security Clearance Eligibility required. - **Company:** Appvia Ltd - **Location:** London, UK - **Experience:** Expert - **Salary:** £70,000.0 - £80,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Cloud Computing, Apache Maven, MongoDB, Node.Js, Software Engineering, Software Systems, ReactJS, Spring-boot, Backend, Gitlab, SC Clearance, Data Layers, Kubernetes, Playwright, Front End Software Development, Domain Driven Design, Docker, Legacy Systems, Microservices - **Published:** July 10, 2026 - **Apply:** https://www.totaljobs.com/job/senior-full-stack-developer/appvia-ltd-job107667835 ## About the Role You must be eligible for UK Security Clearance (SC) : * British Passport or ILR * Resided in the UK for the last 5 years * No criminal record or financial irregularities Requirements About You You are a strong full-stack engineer with a consulting mindset, comfortable working in complex environments and influencing how software is designed and delivered. You will bring: * Strong experience with React and modern front-end development * Strong backend experience with Java (Spring Boot) * A solid grounding in Domain Driven Design (DDD) * Experience working with microservices architectures * Full-stack capability across UI, API, and data layers * Experience working in cloud-native environments (ideally AWS) * Interest or experience in AI-assisted development to improve productivity and quality * Confidence working directly with stakeholders and guiding technical decisions ## Description We are hiring multiple Senior Java / React Full Stack Developers to join a growing Software Engineering practice, supporting a large-scale modernisation and AI-enabled transformation programme. This is a hands-on, client-facing role where you will help shape and deliver modern software solutions within complex environments working on what is effectively a greenfield build within a brownfield ecosystem, introducing new architecture, tooling, and engineering standards to enable long-term scalability. You will report into a Principal Software Engineer, contributing to both delivery and the continued growth of Appvia's software engineering capability. Interview Process - 2 Stage * Discovery conversation with Talent Acquisition * Technical Interview with Engineering Team * Final Interview with Leadership, * Design and deliver modern Java / React applications within complex systems * Contribute to modernisation of legacy systems into scalable, service-based architectures * Apply DDD principles to improve system structure and maintainability * Improve development workflows, testing approaches, and engineering standards * Collaborate with platform and test engineers to deliver integrated, end-to-end solutions * Introduce and embed modern tooling and AI-assisted development practices * Act as a senior consultant within delivery teams, influencing engineering best practices * Support teams in building scalable, maintainable, and high-quality software Technical Skills Core technologies: * Java / Spring Boot * React / Node.js * HTML / CSS / JavaScript * MongoDB * Docker / Kubernetes * Maven * GitLab Nice to have: * Playwright or modern testing frameworks * GovUK Design System / UI Framework ## Related Videos - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [WeAreDevelopers LIVE - Modern DevOps for IoT Devices and More](https://www.wearedevelopers.com/videos/1805-wearedevelopers-live-modern-devops-for-iot-devices-and-more) - [40 Minutes to Build a Serverless COVID-19 REST and GraphQL APIs](https://www.wearedevelopers.com/videos/208-40-minutes-to-build-a-serverless-covid-19-rest-and-graphql-apis) - [The Evolving Landscape of Application Development: Insights from Three Years of Research](https://www.wearedevelopers.com/videos/1459-the-evolving-landscape-of-application-development-insights-from-three-years-of-research) - [Enabling automated 1-click customer deployments with built-in quality and security](https://www.wearedevelopers.com/videos/83-enabling-automated-1-click-customer-deployments-with-built-in-quality-and-security) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk)