Senior Full Stack Developer

Senior Full Stack Developer

Internal

Title:

Senior Full Stack Developer

Location: London, UK (Hybrid - typically 1-2 days per month in office)

Contract: Permanent, Full-time OR Outside IR35 Contract, 6 months with view to extend

Day Rate (contract): £500-550 per day

Package (perm): £70,000 - £80,000 + 10% Bonus + 10% Shares + Benefits (see more below)

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.

We’re hiring multiple Senior Full Stack Engineers (Java / Type Script) to join a growing Software Engineering practice supporting a major modernisation and AI-enabled transformation programme.

This is a hands‑on, client‑facing role where you’ll help design and deliver modern software solutions in complex environments. You’ll be working on what is effectively a greenfield build within a brownfield ecosystem, introducing new architecture, tooling, and engineering standards to enable long‑term scalability and resilience.

You will report into a Principal Software Engineer, contributing both to day‑to‑day delivery and the continued growth of Appvia’s software engineering capability and technical direction.

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

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 Type Script and modern Frontend 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

• Design and deliver modern Java and Type Script applications in 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

Core technologies:

• Java / Spring Boot
• Type Script for Frontend
• HTML / CSS / Java Script
• MongoDB
• Docker / Kubernetes
• Maven
• Git Lab

Nice to have:

• Playwright or modern testing frameworks
• GovUK Design System / UI Framework

Why join Appvia?

We are a self‑funded, London‑based consultancy, growing rapidly while staying true to what got us here: a human, engineering‑led culture built on trust, ownership, and getting things done.

As we scale, we’re maturing as a business and expanding into new areas across platform engineering, software, data, and AI. We’re intentional about keeping our culture at the heart of it. We operate with a flat structure, agile ways of working, and a strong focus on collaboration, where good ideas come from anywhere and people are trusted to make an impact.

We work alongside our customers…