Senior Java Engineer – Platform

We're building a high-impact payments platform for a top-tier investment bank – think real-time, high-volume transactions, sub-10ms latency, and millions of operations per second
. This isn't a CRUD role. This is core Java engineering, building and optimising systems that sit at the heart of global payments infrastructure. You'll join a small, senior team with real ownership – you'll own services end-to-end, from design to production support. Your work will power real-time payments across the globe.

• Design, build, and optimise high-throughput, low-latency distributed systems using Java 21+, Spring Boot, Kafka, and Kubernetes
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• Work with event-driven architectures and asynchronous messaging.
• Tune JVM performance, debug production issues, and optimise for reliability.
• Own the full lifecycle: requirements, design, implementation, testing, and production support.
• Collaborate with engineers, architects, and business stakeholders in an Agile environment.

• 8+ years of hands-on Java development experience
• Expert knowledge of Java 17/21
  , Spring Boot, and modern JVM features
• Deep understanding of concurrency, multithreading, and performance tuning
• Experience with Kafka (or similar messaging systems) and event-driven architectures
• Strong grasp of distributed systems – fault tolerance, idempotency, resilience
• Production debugging skills – thread dumps, heap analysis, profiling tools
• UK or US work authorisation (we cannot sponsor visas)

• Experience in payments, trading, or financial services – especially low-latency systems
• Experience with reactive programming (Spring Web Flux, Akka)
• Familiarity with ISO 20022, SWIFT, or FIX standards
• Cloud-native experience (AWS, GCP, or Azure) with Kubernetes

• Meaningful Work: Your code will process billions in payments – impact you can see
• Modern Tech Stack: Java 21, virtual threads, Kafka, Kubernetes – not legacy maintenance
• Senior Team: Work alongside engineers from top banks and trading firms
• Stable, Long-Term: This is a permanent role with a top-tier investment bank – real job security
• Hybrid Flexibility: 2-3 days in the office at Canary Wharf, rest remote

How to Apply:
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Right to work status: No visa sponsorship available. (UK work authorisation only)