Java Developer (f/m/x)

Senior • Hybrid

Bialystok, Poland

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

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."

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