Junior Backend Engineer

Junior/Graduate Backend Engineer A UK fintech building an AI-powered autonomous savings product - an app that automatically manages customers' money across accounts to help them earn a better return. The company is pre-launch, well-funded by seed investors, and building core financial infrastructure from the ground up. The company is hiring a graduate/junior backend engineer to work alongside the CTO on the systems that power the product, the money-movement engine, ledger and APIs. The successful candidate will start on well-scoped, supervised backend work and grow into more responsibility as they prove themselves. Hands-on, with real mentorship and real impact: code reaches customers quickly. What you'll do Build and test backend services in Java/Spring on AWS.Work with event-driven systems (Kafka, event sourcing) while learning the architecture.Write clean, well-tested code and take feedback through code review.Contribute to APIs, data and integration work across the stack. What they're looking for Solid Java fundamentals (from a Computer Science degree or equivalent self-taught experience).Evidence of building things and teaching yourself fast - a side project, dissertation, hackathon or open-source work.Care for clean, correct code and a willingness to learn payments/fintech.UK-based, with the right to work in the UK. Nice to have (not essential) Any exposure to Spring, AWS, SQL, Python, Flutter/Dart or event-driven systems.Interest in fintech, open banking or AI agents. Details 2 days on site in LondonUp to £45,000