About this role

Senior Java Developer Harvey Nash Technology Musts: Java Senior Java Developer | Remote| Fintech Client You will: Modernise legacy Java services using AI-assisted analysis, refactoring and testing Build AI-powered CI/CD pipelines with automated code review, test generation and security scanning Develop MCP servers and LLM-based tooling for other engineering teams Ship measurable results: faster APIs, better performance, higher reliability You bring: 6+ years of Java backend experience with strong Spring Boot expertise Hands-on experience modernising legacy systems at scale Background in banking, fintech, trading or similar high-reliability domain Solid multithreading knowledge in production systems (concurrency, locking, atomics) Practical use of AI dev tools – Claude Code, GitHub Copilot or similar Strong API design and microservices architecture knowledge English B2+

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