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

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• Modernise critical legacy Java services using AI-driven analysis and refactoring
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• Apply migration patterns (e.g. strangler fig) to deliver clean, modern APIs
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• Ship improvements in fast cycles with measurable gains in performance and reliability
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• Build AI-powered tooling, including MCP servers and AI-assisted CI/CD pipelines
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• Demonstrate how AI transforms developer productivity and code quality
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What We’re Looking For

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• 10+ years’ backend engineering experience (Java)
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• Proven experience modernising production systems at scale
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• Hands-on use of AI development tools (e.g. Claude Code, GitHub Copilot, LLMs)
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• Experience with MCP, AI automation, or agentic AI systems
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• Strong understanding of microservices and API design
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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