Senior Full Stack Java/React Engineer - Contract in City of London

Senior Full Stack Java/React Engineer – Contract

Base pay range

Direct message the job poster from Fruition Group

Role Information

• Role: Senior Full Stack Engineer
• Location: London, 1x a week
• Rate: Up to £600 per day – Outside IR35
• Length: 6 Months (Good chance of extension)

About the Role

We are seeking a Senior Java / React Full Stack Developer to join our client on a contract basis as a hands‑on engineering consultant within a Solutions Engineering team.

This role centres on modernising large‑scale, complex software systems, reducing technical debt, and improving delivery speed and reliability. You will work closely with client engineering teams, alongside platform and test engineers, helping to introduce modern development practices and AI‑assisted engineering techniques to enhance productivity.

You will report to a Principal Software Engineer and play a key role in promoting and embedding best practices within delivery teams.

About You

• Strong experience with React and modern front‑end development
• Strong experience with Java backend development (Spring, MongoDB)
• 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

Responsibilities

• Design and deliver modern Java/React applications within complex environments
• Improve development workflows, testing approaches, and overall developer productivity
• Support the decomposition of 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 engineering best practices

Technical Skills

• Java / Spring
• React
• XML / HTML / CSS
• MongoDB
• Playwright
• Docker / Kubernetes
• Maven
• GitLab

We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age.

Seniority level

Mid‑Senior level

Employment type

Contract

Job function

Information Technology

Industries

Technology, Information and Media