Harnham
Full Stack Engineer (Java + React)
Full Stack Engineer (Java + React) at Harnham, based in London. This is a permanent role with hybrid working.
- Pay
- Not given by the employer
- Hours and contract
- Permanent · Hybrid
- Location
- London
- Closing date
- Sector
- Software Developer
Reference https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-full-stack-engi
About the role
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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
To Apply for this Job Click Here
Reference: https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-full-stack-engi · Posted 3 days ago · Closes 1 Dec 2026 · Listed via Harnham
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