Senior Java Engineer - Low-Latency Payments (Hybrid)

RE Partners; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

RE Partners is seeking a Senior Java Engineer to join a small, elite team delivering a high-impact payments platform for a top-tier investment bank. You will design and optimise low-latency microservices, build with Java 21, Spring Boot, Kafka, and Kubernetes, and own services from design to production support.

The role requires 8+ years of hands-on Java experience, strong concurrency skills, and a good understanding of distributed systems.

Qualifications

• 8+ years of hands-on Java development experience.
• Strong experience with multithreading and concurrency in production.
• Experience with Kafka (or similar messaging systems).
• Good understanding of distributed systems and cloud-native architectures.
• UK work authorisation (no visa sponsorship available).

Responsibilities

• Design, build, and optimise low-latency, high-throughput microservices using Java 21, Spring Boot, Kafka, and Kubernetes.
• Own services end-to-end – from architecture and implementation to deployment and production support.
• Work on concurrency, multithreading, and performance tuning – solving real production problems.
• Collaborate with a small, senior team – no hand-holding, real ownership.
• Drive code quality, engineering standards, and best practices across the organisation.

Skills

Java

Multithreading

Distributed systems

Spring Boot

Kafka

Kubernetes

AWS

Tools

Kafka

Kubernetes

AWS

Job description

RE Partners is seeking a Senior Java Engineer to join a small, elite team delivering a high-impact payments platform for a top-tier investment bank. You will design and optimise low-latency microservices, build with Java 21, Spring Boot, Kafka, and Kubernetes, and own services from design to production support.

The role requires 8+ years of hands-on Java experience, strong concurrency skills, and a good understanding of distributed systems.