Full Stack Developer (Java)

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

Key Responsibilities

• 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

Requirements

• 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