via Reed · 11 September 2026 ·9 days ago

Full Stack Engineer (AI Native)

Harnham - Data & Analytics Recruitment
London Full-time GBP 70,000 – 85,000
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FULL STACK ENGINEER (AI-NATIVE)

Up to £85,000 + Benefits
London (Hybrid, 2 Days per Week)

This is a great opportunity to join a high-growth fintech scale-up where you can take ownership of customer-facing products whilst working in an AI-first engineering environment. You'll help build technology that combines financial data, analytics, and behavioural insights to deliver meaningful outcomes for end users.

THE COMPANY: This rapidly growing WealthTech business is transforming how individuals engage with their financial lives through innovative technology, sophisticated analytics, and exceptional user experience. Backed by leading investors and operating in a scale-up environment, the business is building a platform that provides users with a complete view of their financial world alongside personalised insights and recommendations.

The engineering function operates through cross-functional Agile squads and is heavily focused on leveraging AI to increase engineering productivity and innovation.

THE ROLE: You will take ownership of software within one of the engineering squads, contributing across both front-end and back-end development while working alongside product, engineering, and technical operations teams.

Key responsibilities include:

  • Building and enhancing customer-facing web applications.

  • Developing scalable features using React, JavaScript and TypeScript.

  • Contributing to backend services built with Kotlin and Spring.

  • Leveraging AI tools and agentic development workflows as part of your day-to-day engineering process.

  • Working within Agile Scrum teams to plan, develop, test and release software.

  • Collaborating on APIs, microservices and event-driven architectures.

  • Driving software quality, performance, security and scalability.

YOUR SKILLS AND EXPERIENCE: You will bring strong capability in:
  • Java and Kotlin backend development on the Spring stack.

  • React, JavaScript and TypeScript.

  • AI-assisted development, particularly using Claude and agentic engineering workflows.

  • CI/CD pipelines, automated testing and API integrations.

  • AWS, Docker and/or Kubernetes.

  • Jira, Agile methodologies and collaborative software delivery.

THE BENEFITS: You will receive a salary of up to £85,000 depending on experience, along with a comprehensive benefits package.

Please note: Sponsorship is not available for this position.

HOW TO APPLY: Please register your interest by sending your CV to Molly Bird via the apply link on this page.

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