Java Full Stack Developer (Hybrid – 2 Days Onsite in Kraków, Poland)

We are looking for a skilled Java Full Stack Developer to join our team in Kraków. This is a hybrid role requiring 2 days per week onsite, offering the opportunity to work on modernizing enterprise systems and building scalable, cloud-native solutions. Key Responsibilities • Design, build, and support scalable services, microservices, and applications (both backend and frontend) using Java (11/17/21) and modern web technologies such as React • Contribute to the modernization of legacy systems, including migration from mainframe and IBM WebSphere to API-driven and microservices-based architectures • Help reduce operational costs and system complexity through modern engineering practices • Improve testing efficiency by implementing and expanding automated testing frameworks • Enhance Straight-Through Processing (STP) capabilities across services and platforms Required Skills & Experience • Strong experience with Java (11 or higher); experience with Java 17+ is highly preferred • Hands-on experience with Kubernetes and containerized environments • Proficiency with Git for version control • Strong command of Unix/Linux systems and CLI tools • Solid experience with databases and SQL (Oracle preferred) • Good understanding of RESTful APIs and microservices architecture • Familiarity with HTTP/web technologies and JavaScript Nice to Have • Experience with Reactjs for frontend development • Background working in a DevOps-oriented delivery team • Knowledge of application monitoring and observability tools • Experience with Spring / Spring Boot