Salary: 1100 - 1300 PLN/day on B2B Work model: hybrid from Gdańsk (2, 3 days per week from the office)   Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings   Project You will be involved in a financial project focused on supporting the PIP (Payments Information Provisioning) Downtown team in delivering SEK Batch functionalities. The project plays a key role in building and maintaining distributed, high-performance backend systems within the financial domain, with a strong emphasis on event-driven architectures and real-time data processing. We are looking for an Expert Java Developer with strong experience in Kafka-based event-driven systems and relational databases, who is comfortable working in complex, distributed environments. The ideal candidate combines hands-on backend development with a solid understanding of software architecture, scalability, and clean code principles, and can actively contribute to both implementation and technical decision-making.   Responsibilities you'll have Support the PIP Downtown team in delivering SEK Batch functionalities Design, develop, and maintain backend services in Java Design, implement, and optimize Kafka producer and consumer logic Build and operate services running in Kubernetes-based environments Work with relational databases (Oracle, DB2, MSSQL or similar) Build distributed, highly-available, and high-throughput applications Apply architectural patterns such as microservices, domain-driven design, and event sourcing Ensure clean, maintainable, and high-quality code   Expected competences and knowledge Java – Expert level (minimum 8 years of experience working as a Java Developer) Kafka – Expert level, including designing and optimizing producer and consumer code SQL – Senior level (Oracle, DB2, MSSQL or similar RDBMS) Proven experience in building distributed, highly-available, high-throughput systems Hands-on experience in applying domain-driven design, event sourcing, microservices architecture, and clean code principles in real-world projects   Nice-to-have knowledge and experience Data engineering background Kubernetes – hands-on experience in running and operating backend services   Technologies you'll work with Java Kafka Oracle / DB2 / MSSQL SQL Kubernetes Microservices Event-driven systems   Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language.    About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.