Senior Java Engineer

Java, Low-Latency, Multi-threading, AI, Transformation, Algo CORE BANKING, TRADING SYSTEMS or HIGH TRANSACTIONAL 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 • 10+ 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 London 3 days a week in the City Cracow- 3 days per week -7920 Euro Gross Perm Month + Bonus + Bens Poland Remote B2B - 8790 Euro Gross Per Month, Madrid Remote, Milan Remote to 75K Euro Per year + Bonus + Bens The interview process is an algorithmic coding exercise online with client panel. Java / Microservices / API design / LLMs / AI / Claude Code / Copilot /Algo