> Markdown version of [/jobs/ext/2794042-senior-java-software-engineer](https://www.wearedevelopers.com/jobs/ext/2794042-senior-java-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Java Software Engineer

- **Company:** RE Partners
- **Location:** London, UK (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, Cloud Engineering, Software Quality, Software Debugging, Distributed Systems, Financial Information EXchange, Performance Tuning, Multithreading, Concurrency, Spring-boot, Kubernetes, Apache Kafka, Crud, Microservices
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840621912-senior-java-software-engineer

## About the Role

Must-Have:

 * 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)

Nice to Have

 * Experience in banking, financial services, or payments
 * Experience with Kubernetes and AWS
 * Knowledge of FIX protocol or electronic trading systems
 * Experience with performance tuning and optimisation

## Description

We are looking for a Senior Java Engineer to join a small, elite team working on a high-impact payments platform for a top-tier investment bank. This is not a generic CRUD role. You'll be building and optimising systems that process millions of transactions per second - low-latency, high-throughput, mission-critical. The team is senior, empowered, and takes full ownership of services from design to production support. If you're a hands-on Java engineer who enjoys solving complex performance problems, debugging threading issues, and working with modern tech, this could be the right move for you., * 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 a wider organisation


## Related Videos

- [Concurrency with Go](https://www.wearedevelopers.com/videos/191-concurrency-with-go)
- [Understanding Kubernetes in a visual way](https://www.wearedevelopers.com/videos/100085-understanding-kubernetes-in-a-visual-way)
- [Rest API Antipatterns](https://www.wearedevelopers.com/videos/100208-rest-api-antipatterns)
- [Enterprise-Cloud-Native - Fast-Paced Development & Deployment in a Highly Secure Banking Environment](https://www.wearedevelopers.com/videos/671-enterprise-cloud-native-fast-paced-development-deployment-in-a-highly-secure-banking-environment)
- [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape)
- [Development of reactive applications with Quarkus](https://www.wearedevelopers.com/videos/89-development-of-reactive-applications-with-quarkus)

## Related Articles

- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)
- [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)
- [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)
- [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)
- [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs)