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    Full Stack Engineer (Java + React)

    Technology
    Harnham - Data & Analytics Recruitment
    London
    Permanent
    Competitive
    On-Site

    Job Description

    Full Stack Engineer (React / TypeScript / Java)

    Up to £85,000 + Benefits

    Hybrid Working London 2 Days per Week in Office

    We're working with a fast-growing WealthTech business that is transforming the way individuals and families engage with their finances through innovative technology and exceptional user experiences.

    They're looking for a Full Stack Engineer to join a highly collaborative engineering team building and enhancing a modern web platform. This role is approximately 65% Frontend and 35% Backend , making it ideal for engineers who enjoy creating outstanding user experiences while remaining hands-on across the full stack.

    The Role

    You'll join a cross-functional squad responsible for delivering new features, improving platform performance, and helping shape technical decisions across the product.

    The role has a strong frontend focus, but you'll also contribute to backend services and APIs, working within a modern cloud-native environment.

    A key aspect of the engineering culture is the use of AI-assisted development tools , so candidates must already be comfortable incorporating AI into their daily workflow for coding, testing, and productivity.

    Essential Requirements

    • Strong commercial experience with React

    • Strong commercial experience with TypeScript

    • Commercial backend development experience with Java

    • Experience working with Spring / Spring Boot

    • Hands-on experience using AI-assisted development tools as part of the software development lifecycle

    • Experience developing and consuming APIs

    • Understanding of software engineering best practices, testing, and clean code principles

    • Experience working within Agile environments

    Nice to Have

    • Kotlin experience

    • AWS experience

    • Docker and Kubernetes

    • Microservices architecture

    • Event-driven systems (Kafka or similar)

    • GraphQL

    What You'll Get

    • Salary up to £85,000

    • Hybrid working (2 days per week in London)

    • Private healthcare

    • Pension contribution

    • 25 days holiday

    • Regular team socials

    • Clear progression opportunities within a growing engineering organisation

    Posted on October 25, 2026

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