Principal Java Engineer | Event Streaming Platform | Financial Markets Technology

Principal Java Engineer | Event Streaming Platform | Financial Markets Technology London - Hybrid £120k-150k base

The Role

This is a hands-on Principal Engineer role working on the Event Streaming Platform, for someone who still wants to build, while having real influence over how engineering gets done. You'll take technical ownership of business-critical platforms in a financial markets environment, shaping architecture and engineering standards while staying close to the code.

The value is in technical judgement, solving difficult engineering problems and raising the bar across multiple teams. What You Will Be Doing: Own technical direction for complex Java platforms, from architecture and design through to production delivery.

Build and evolve distributed, event-driven services using Java, APIs, Kafka and modern integration patterns. Make pragmatic architecture decisions around scalability, resilience, security and maintainability. Improve the route into production through CI/CD, infrastructure automation, automated testing and modern DevOps practices.

Work closely with engineering, product, security and operational stakeholders, particularly where there are competing technical or commercial priorities. Mentor engineers and influence standards through design reviews, hands-on engineering and clear technical leadership.

What they are looking for: Strong hands-on Java engineering capability, particularly across distributed or high-throughput production systems Experience with event-driven architectures Practical experience running containerised applications in production A strong understanding of application security Understanding of DevOps Low-Latency experience would be beneficial ...

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