Senior Full Stack Developer - UK Security Clearance Eligibility required.

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

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

Why join Appvia?

We are a self-funded, London based startup; providing businesses with a fast and secure way to deploy containerised applications into the cloud.

We are on a mission to enable organisations to make cloud-based software delivery simple and efficient, whilst having the insights into costs, security and cadence. As a company that holds customers at the heart of everything we do, we are looking for candidates that want to make a real change to how Dev and Ops is working in the industry.

With us our customers, like the UK’s Home Office & Bank of England, are harnessing cloud-native technologies, limiting the challenges of infrastructure management and rapidly delivering digital products.

What’s on offer?

• ? Work-life balance

• Flexible working with core hours of 10-4pm because we know life happens outside of work
• Hybrid working - only one compulsory office day per month
• 25 days’ holiday a year, plus bank holidays
• An additional day off for your birthday
• Enhanced maternity and paternity to full pay
• Workplace Nursery Benefit to help working parents

For your well-being

• Full Private Healthcare cover for you with partners and children covered 50%
• Death in Service
• Cycle to Work scheme
• Electric Car Scheme
• Pension plus a salary sacrifice option for even greater savings
• Employee Assistance Programme
• Free hygiene products available in the London office

Mental health support

• Free therapy through AXA
• Access to the Headspace App
• Trained Mental Health First Aiders

Other fun perks

• Learning budget of £1,000 a year
• Your own MacBook Pro while you work at Appvia
• Dog friendly office
• Wear what makes you comfortable
• Free snacks in the office
• Pool table & ping pong table
• Regular team socials, board game nights, industry meetups and more!

Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery.

Our software engineering capability focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience.

We work across complex, high-impact environments in both the public and private sector, delivering solutions where quality, scalability, and reliability are critical.