Senior Java Backend Engineer - Payments Platform

Experis ManpowerGroup Sp. z o.o. seeks a Senior Java Developer to join a large-scale payment technology project. You will design backend solutions for a Terminal Management System supporting 300,000+ terminals and contribute to modernization efforts.

The role requires Java 8+, Spring, Hibernate, REST APIs, and strong experience with distributed architectures. You will review requirements, create technical documentation, perform security scans, and help evolve a complex enterprise solution.