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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Java Developer (Low-Latency Payments Systems) - **Company:** RE Partners - **Location:** Greater London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Kubernetes Security, Java (Programming Language), Amazon Web Services, Amazon S3, Program Optimization, Software Design Patterns, DevOps, Fault Tolerance, Enterprise Messaging Systems, MongoDB, NoSQL, OpenShift, Parsing, Payment Gateway, Performance Tuning, RabbitMQ, Software Deployment, SQL Databases, Extensible Markup Language (XML), Spring-boot, Backend, Kubernetes, Low Latency, ISO 20022 Standard, Real Time Data, Apache Kafka, Restful APIs, Microservices - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840589313-senior-java-developer-low-latency-payments-systems ## About the Role * 5+ years of experience in Core Java development with a focus on performance and memory optimization. * Proficient in SpringBoot and microservice-based architecture. * Proven experience with low-latency, high-throughput applications (sub-millisecond response times a plus). * Experience working with XML and message parsing/transformation. * 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. * Solid understanding of MongoDB and NoSQL design patterns. * Prior experience in Payments Processing, financial services, or banking systems. * Strong communication skills and a bias toward action and opinionated design decisions., * Familiarity with messaging systems (Kafka, RabbitMQ, etc.) * Exposure to container security and performance tuning on OpenShift. * Knowledge of payment gateways, ISO 20022, or SWIFT formats. * Collaborative, fast-paced, and engineering-driven culture. Emphasis on engineering autonomy, architectural decision-making, and clean code. ## Description We are seeking an experienced and opinionated Java Developer to join our high-performing engineering team, working on low latency, high-throughput systems in the payments processing domain. This hybrid role is based in the UK or US and offers the opportunity to build scalable, real-time services using modern technologies. If you're passionate about performance, have strong Core Java and SpringBoot expertise, and thrive in a collaborative yet opinionated engineering culture, we want to hear from you., * Design, develop, and optimize low-latency, high-throughput backend systems using Core Java and SpringBoot. * Build and maintain RESTful APIs and microservices that power secure payment workflows. * Work with XML-based 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. * Participate in architectural discussions, advocate for best practices, and provide mentorship to peers. * Drive performance tuning, fault tolerance, and observability improvements across services. ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [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) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) ## Related Articles - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [10 Highest Paying Programming Languages 2025](https://www.wearedevelopers.com/magazine/150-10-highest-paying-programming-languages-2025)