Java Developer | Financial Services

Java Developer – Global Investment Bank – Krakow Cross‑Asset Platform | Kafka Migration | Modernisation Project B2B | Hybrid - 3 days per week A global investment bank is expanding its Krakow engineering hub and is looking for Java Developers to support the growth of a 20‑year‑old cross‑asset platform that is now undergoing major modernisation. This is a hands‑on engineering role focused on Kafka integration, microservices, and cloud‑aligned development practices. You’ll join a collaborative team of 20+ developers in Poland, delivering monthly releases that support middle‑office trade capture workflows. What you’ll work on • Enhancing and modernising a long‑standing cross‑asset platform • Designing and building Kafka integrations as the platform transitions to event‑driven architecture • Developing microservices using Java, Spring, Spring Boot • Setting up and configuring DevOps pipelines, CI/CD, and environment configs • Applying strong software engineering fundamentals to improve reliability and maintainability • Writing and optimising SQL queries for data access and reporting • Contributing to monthly release cycles and global delivery processes What you bring • Solid commercial experience with Java, Spring, and Spring Boot • Hands‑on experience with Kafka (building integrations, understanding redundancy, event flows) • Understanding of microservices, distributed systems, and cloud‑ready architectures • Ability to work with and improve legacy systems while contributing to modernisation • Experience with DevOps concepts: configs, pipelines, CI/CD • SQL proficiency • Comfortable collaborating with global teams across time zones Nice to have • Financial services experience, especially in the middle‑office or trade capture • Exposure to cloud platforms (AWS/Azure/GCP) • Experience working on large, long‑lived enterprise systems Why this role stands out • Growth hire — join a team that’s expanding, not replacing • Opportunity to modernise a major platform, moving to Kafka-driven architecture • Work with a large, supportive engineering community in Poland • Stable monthly release cycle and clear delivery rhythm