Senior Java Developer

We are looking for a Senior Java Developer to build and evolve high-load backend services for a banking / FinTech platform. The role is focused on microservice development, distributed systems, event-driven architecture, performance optimization, and production-grade engineering practices. The engineer will work with Java 17+, Spring Boot 3+, PostgreSQL, Kafka, Infinispan, Docker, OpenShift, GitLab CI, and observability tooling. Responsibilities Develop high-load backend services using Java and Spring Boot Design and evolve microservice and event-driven architectures Identify and resolve architectural and performance bottlenecks Implement REST APIs and integrations with internal and external systems Work with distributed transactions and Saga-based patterns Design reliable interactions through Kafka Perform code reviews and promote engineering best practices Develop unit, integration, and performance tests Troubleshoot production issues using logs, APM, metrics, and dashboards Mentor less experienced engineers Requirements 5+ years of commercial Java development experience Expertise in Java 17+ and Spring Boot 3+ Strong understanding of multithreading, concurrency, collections, generics, Streams, and exception handling Experience with Spring Core, Data, Security, Hibernate / JPA Strong PostgreSQL experience; understanding of high-availability setups such as Patroni Hands-on Kafka experience and understanding of event-driven architectures Experience with distributed systems, scalability, Saga patterns, and REST APIs Familiarity with Docker, OpenShift, and GitLab CI, Maven / Gradle Strong troubleshooting and observability skills English B2 and higher Nice to have Banking / FinTech experience