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 tasksDeveloping and maintaining backend services using Java and Spring BootTroubleshooting and resolving issues in existing applicationsPreparing technical documentationOptimizing application performance and ensuring code qualityCreating technical documentation for developed functionalitiesEnsuring key functionalities are covered with unit and integration testsContributing innovative ideas to the team while continuously expanding your technical knowledgeRequirementsMinimum 5 years of commercial experience in Java programmingExperience with Hibernate, Spring, REST API, Microservices, and Web ServicesProficiency in message queues, including KafkaHands-on experience with cloud solutions, AWS, Azure, or GCPExperience with unit and integration testing, Spock or JUnitExperience with cloud orchestration tools such as Docker, KubernetesProficiency with relational and non-relational databasesGood command of English and Polish, both spoken and writtenResiding in Poland requiredNice-to-have requirementsFamiliarity with front-end technologies, e.g., Angular, ReactFamiliarity with AI/LLM tools to accelerate coding, refactoring, and bug fixing, e.g., Copilot, CursorPreferred candidates from Białystok