Java Backend Engineer — Spring Boot, Hybrid Warsaw
Summary
ALTEN Polska is hiring a mid-level Java Backend Engineer to work on backend applications and system integrations using Java 21, Spring Boot 3, and microservices architecture. The role is based in Warsaw and requires experience with Kafka, Docker, and various database technologies.
ALTEN Polska is seeking a mid-level Backend Developer specializing in Java 21+ and Spring Boot 3+ to contribute to backend applications, system integrations, and performance optimization in a hybrid Warsaw setting.
The candidate should have 3-5 years of backend experience, strong knowledge of microservices, and hands-on experience with Kafka, Docker, PostgreSQL, MongoDB, and REST APIs. The role offers a stable career path within a European engineering & IT leader.