Senior Full-Stack Engineer (Java/TypeScript) - AI-Driven Modernisation

Appvia; Greater London; Hybrid; GBP 70,000 - 85,000; Full time

Benefits offered by this job

Flexible working hours

Hybrid working

25 days’ holiday + birthday day

Enhanced maternity/paternity

Workplace Nursery Benefit

Private Healthcare

Job summary

Appvia, a London-based cloud and platform engineering consultancy, seeks Senior Full Stack Engineers (Java/TypeScript) to join a growing Software Engineering practice supporting a major modernisation and AI-enabled transformation programme.

This hands-on, client-facing role designs and delivers modern software in greenfield work within a brownfield ecosystem, introducing new architecture, tooling, and standards for long-term scalability.

Qualifications

• Strong experience with TypeScript and modern Frontend development.
• Strong backend experience with Java (Spring Boot).
• Solid grounding in Domain Driven Design (DDD).
• Experience working with microservices architectures.
• Full-stack capability across UI, API, and data layers.

Responsibilities

• Design and deliver modern Java and TypeScript 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.

Skills

Java / Spring Boot

TypeScript for Frontend

HTML / CSS / JavaScript

MongoDB

Docker / Kubernetes

Maven

GitLab

Tools

Java / Spring Boot

TypeScript

HTML/CSS/JS

MongoDB

Docker

Kubernetes

Maven

GitLab

Job description

Appvia, a London-based cloud and platform engineering consultancy, seeks Senior Full Stack Engineers (Java/TypeScript) to join a growing Software Engineering practice supporting a major modernisation and AI-enabled transformation programme.

This hands-on, client-facing role designs and delivers modern software in greenfield work within a brownfield ecosystem, introducing new architecture, tooling, and standards for long-term scalability.