Java Developer (f/m/x)

Sii is a place where experienced Java Developers work on projects with a global reach, utilizing modern technologies, microservices architecture, and cloud and AI solutions. Our Digital Competence Centre comprises over 1,500 experts who develop enterprise solutions for sectors including finance, telecoms, e-commerce, manufacturing, retail, and healthcare. If you’re looking for a stable environment, projects with a real impact, and opportunities for continuous development, you’ll find a place for yourself at Sii. Your tasks • Developing and maintaining backend services using Java and Spring Boot • Troubleshooting and resolving issues in existing applications • Preparing technical documentation • Optimizing application performance and ensuring code quality • Creating technical documentation for developed functionalities • Ensuring key functionalities are covered with unit and integration tests • Contributing innovative ideas to the team while continuously expanding your technical knowledge Requirements • Minimum 5 years of commercial experience in Java programming • Experience with Hibernate, Spring, REST API, Microservices, and Web Services • Proficiency in message queues, including Kafka • Hands-on experience with cloud solutions, AWS, Azure, or GCP • Experience with unit and integration testing, Spock or JUnit • Experience with cloud orchestration tools such as Docker, Kubernetes • Proficiency with relational and non-relational databases • Good command of English and Polish, both spoken and written • Residing in Poland required Nice-to-have requirements • Familiarity with front-end technologies, e.g., Angular, React • Familiarity with AI/LLM tools to accelerate coding, refactoring, and bug fixing, e.g., Copilot, Cursor • Preferred candidates from Białystok