Senior Java Engineer – AI & Modernisation

Senior Java Engineer – AI & Modernisation

London | Hybrid

Myn is recruiting for a major financial technology organisation investing heavily in the use of AI across software engineering and the modernisation of large-scale technology platforms.

The role

You’ll work on the modernisation of complex backend services, helping move legacy applications towards cleaner APIs, microservices and modern cloud-based architectures.

Alongside hands‑on Java engineering, you’ll explore how LLMs and AI‑assisted development can improve code analysis, refactoring, testing, documentation and delivery automation.

You’ll have the opportunity to build reusable AI‑enabled engineering workflows and help demonstrate how these tools can be applied safely and effectively within a large production environment.

What we’re looking for

Extensive Java backend engineering experience

Spring Boot, APIs and microservices

Experience modernising complex production applications

Distributed systems and service‑based architectures

CI/CD and automated testing

Cloud‑based application development

Strong software design and engineering fundamentals

Experience working with business‑critical production systems

We’re particularly interested in practical experience with some of the following

Claude Code, GitHub Copilot, Cursor or similar AI development tools

LLM APIs and AI integrations

Model Context Protocol (MCP)

Agentic AI workflows

AI‑assisted code analysis and refactoring

Automated test and documentation generation

AI‑enabled CI/CD and engineering automation

Prompt engineering and understanding the capabilities and limitations of LLMs

You don’t need to tick every AI box. What’s important is that you’re already experimenting with or implementing AI as an engineering tool rather than simply having an interest in the subject.

Location: LondonWorking pattern: Hybrid

If you’re a strong Java Engineer who wants to be at the forefront of how AI is changing software engineering, this could be an excellent next move.

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