Java / Microservices / API design / LLMs / AI / Claude Code / Copilot
Company: Financial Services
Location: London - Hybrid 3 days per week
Rate: £575
IR35: Outside
CORE BANKING AND TRADING SYSTEMS EXPERIENCE ESSENTIAL
Join a newly formed Service Modernisation & AI team driving AI-first software development in financial services. This is a hands-on role modernising high-impact legacy services while building AI-powered engineering workflows.
What You’ll Do
* Modernise critical legacy Java services using AI-driven analysis and refactoring
* Apply migration patterns (e.g. strangler fig) to deliver clean, modern APIs
* Ship improvements in fast cycles with measurable gains in performance and reliability
* Build AI-powered tooling, including MCP servers and AI-assisted CI/CD pipelines
* Demonstrate how AI transforms developer productivity and code quality
What We’re Looking For
* 6+ years’ backend engineering experience (Java)
* Proven experience modernising production systems at scale
* Hands-on use of AI development tools (e.g. Claude Code, GitHub Copilot, LLMs)
* Experience with MCP, AI automation, or agentic AI systems
* Strong understanding of microservices and API design
Java / Microservices / API design / LLMs / AI / Claude Code / Copilot