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# Senior Java Engineer

- **Company:** RE Partners
- **Location:** UK
- **Experience:** Expert
- **Salary:** £106,406.0
- **Contract:** Permanent contract
- **Skills:** Kubernetes Security, Java (Programming Language), Amazon Web Services, Amazon S3, Program Optimization, DevOps, Fault Tolerance, Enterprise Messaging Systems, MongoDB, NoSQL, OpenShift, Payment Gateway, Performance Tuning, RabbitMQ, SQL Databases, Spring-boot, Backend, Kubernetes, Low Latency, ISO 20022 Standard, Real Time Data, Apache Kafka, Restful APIs, Microservices
- **Published:** August 14, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5838436819

## About the Role

We are seeking an experienced and opinionated Senior Java Engineer to join our high-performing engineering team, working on low latency, high-throughput systems in the payments processing domain. If you're passionate about performance, have strong Core Java and Spring Boot expertise, and thrive in a collaborative yet opinionated engineering culture, we want to hear from you., * 10+ years of experience in Java development with a focus on performance and memory optimization.

 * Proficient in Mongo, Spring and microservice-based architecture.
 * Proven experience with low-latency, high-throughput applications (sub-millisecond response times a plus).
 * Hands-on experience deploying applications on Red Hat OpenShift and/or Kubernetes.
 * Strong cloud experience with AWS services such as ECS, EKS, Lambda, S3, etc.
 * Strong communication skills and a bias toward action and opinionated design decisions.

Nice to Have:

 * Familiarity with messaging systems (Kafka, RabbitMQ, etc.)
 * Prior experience in Payments Processing, financial services, or banking systems.
 * Exposure to container security and performance tuning on OpenShift.
 * Knowledge of payment gateways, ISO 20022, or SWIFT formats.

## Description

* Design, develop, and optimize low-latency, high-throughput backend systems using Java.
 * Build and maintain RESTful APIs and microservices that power secure payment workflows.
 * Work with messaging standards and protocols commonly used in financial transactions.
 * Deploy, monitor, and scale applications in Red Hat OpenShift and AWS cloud environments.
 * Integrate with MongoDB and other NoSQL/SQL datastores for real-time data management.
 * Collaborate with DevOps, Product, and QA teams to ensure production-grade solutions.
 * Drive architectural changes, advocate for best practices, and provide mentorship to peers.
 * Drive performance tuning, fault tolerance, and observability improvements across services.


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