Principal Java Developer

Principal Java Developer We are seeking an experienced and opinionated Principal Java Engineer 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 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 .Key Responsibilities

• :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 . Required Skills & Experienc
• e:10+ years of experience in Java development with a focus on performance and memory optimizatio
• n.Proficient in Mongo, Spring and microservice-based architectur
• e.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 Kubernete
• s.Strong cloud experience with AWS services such as ECS, EKS, Lambda, S3, et
• c.Strong communication skills and a bias toward action and opinionated design decision s. Nice to Ha
• ve:Familiarity with messaging systems (Kafka, RabbitMQ, et
• c.)Prior experience in Payments Processing, financial services, or banking syste
• ms.Exposure to container security and performance tuning on OpenShi
• ft.Knowledge of payment gateways, ISO 20022, or SWIFT forma ts. Location & Work Environm
• ent:Hybrid work model in London,
• UK.Collaborative, fast-paced, and engineering-driven cult
• ure.Emphasis on engineering autonomy, architectural decision-making, and clean code Join Our Global Team: We invite you to apply for the position at RE Partners. Join us in shaping the future of business technology consulting and transforming the way organizations thrive in a digital world. As a diverse, woman-owned global business, we pride ourselves on keeping talent happy – our 7% attrition rate speaks volumes. Bring your talented friends along and earn a referral bonus Equal Opportunity Empl tatus.