Java Cloud Developer (f/m/x) @ Sii Polska

We are looking for an experienced Java Cloud Developer to join a dynamic team delivering modern digital solutions for business clients. You will be part of a product area focused on virtual card services and digital platforms that support innovative business models such as Click & Collect and fleet management solutions.

Those systems enable end-to-end management of payments and communication with business customers, including fueling, car wash services, invoicing, and card/account management. The portfolio spans both mobile and web applications, as well as external APIs (e.g., Payment-as-a-Service), serving primarily Scandinavian and Baltic markets. You’ll work across a mix of greenfield development and enhancements to existing systems.

• At least 4 years of hands-on experience in Java development
• Strong knowledge of frameworks and tools: Spring (Boot, Data, Cloud), JUnit, Spock, JPA, Hibernate
• Solid experience with PostgreSQL, SQL, NoSQL databases, and Redis
• Practical experience with cloud and containerization technologies (Azure, Kubernetes, Docker)
• Experience building and integrating REST/SOAP APIs, including Swagger/OpenAPI documentation
• Familiarity with CI/CD and development tools: Jenkins, SonarQube, Git, Gradle
• Very good communication skills in both English and Polish
• Residing in Poland required

Nice-to-have requirements

• Knowledge of TDD/BDD practices, e.g., Spock, Mockito, Cucumber
• Basic understanding of Domain-Driven Design (DDD)
• Familiarity with service mesh architectures

We are looking for an experienced Java Cloud Developer to join a dynamic team delivering modern digital solutions for business clients. You will be part of a product area focused on virtual card services and digital platforms that support innovative business models such as Click & Collect and fleet management solutions.

Those systems enable end-to-end management of payments and communication with business customers, including fueling, car wash services, invoicing, and card/account management. The portfolio spans both mobile and web applications, as well as external APIs (e.g., Payment-as-a-Service), serving primarily Scandinavian and Baltic markets. You’ll work across a mix of greenfield development and enhancements to existing systems.

,[Design and implement new features and system improvements, Ensure software quality through testing and validation against requirements, Diagnose, troubleshoot, and resolve technical issues, Collaborate with cross-functional teams in an agile environment, Participate in team ceremonies and contribute to technical discussions, Prepare and maintain technical documentation] Requirements: Java, Spring, Microsoft Azure, Hibernate, SQL, Docker, Kubernetes, NoSQL Additionally: Medical care, Insurance, Sport cards, Language courses, Refferal programs, Welcome packs and other occasional gifts, Passion Sponsorship program, Regular integration events and trips, Contracts with the biggest brands, Diverse portfolio of clients, Flexible forms of employment, Internal training center, Mentoring program, Buddy Program & efficient onboarding process, Technology communities, Jubilee rewards, Profit sharing, Sport & hobby communities, Breakfast, drinks and fresh fruits in the office, Wide portfolio of technologies, Solid financial situation, Comfortable and well-equipped offices, MySii app, Invoice kiosk.