Full Stack Developer (Java)

O projekcie: For our Client we are looking for a Full Stack Java Developer. Warsaw, hybrid (4 days per week from the office) B2B: 28,000–35,000 PLN per month Wymagania: - 4+ years of experience as a Java / Full Stack Developer - Strong hands-on experience with: Java, Spring, Spring Boot (DI, Spring Data, Spring Security) - Hibernate, DB2 - Apache Kafka (producers, consumers, Kafka Streams, Kafka Connect) - MongoDB (document modelling, Spring Data MongoDB) - RESTful APIs, microservices, event‑driven architectures - Maven (multi-module builds) - Docker - Git & CI/CD (GitLab CI preferred) - Experience working in distributed systems and complex legacy codebases - Strong analytical skills and ability to understand complex business logic - Good communication skills and ability to work in a global team Codzienne zadania: - Gather and analyse requirements with business stakeholders - Design, plan, implement and test changes with the engineering team - Adapt and enhance legacy Java applications for ISO 20022 changes - Develop and maintain backend services and integrations - Participate in code reviews, UAT support and production releases - Continuously improve code quality and system design