Senior Java integration developer for enterprise payment systems in fintech.
Build enterprise integration layers connecting modern applications with backend and mainframe systems using Java and Spring Boot. You'll design REST APIs, implement asynchronous messaging with IBM MQ, and manage data transformations between complex system architectures. This hands-on role requires taking technical ownership from design through deployment, plus mentoring team members. Hybrid position based in Warsaw with 3 office days per week.
Membership is €29/month, cancel anytime: every rate, every original listing link, and a daily alert for roles matching your filters.
Found at a specialist agency · listed 24 October 2026 · InsideJobs links you to the original posting.