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

What we offer 

• Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas 

• Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market 

• We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 

• Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more 

• Comfortable workplace – class A offices or remote work 

• Dozens of fascinating projects for prestigious brands from all over the world 

• PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers 

• Investment in your growth – meetups, webinars, training platform and technology blog – you choose 

• Fantastic atmosphere created by all Sii Power People 

If you want to work on systems with high operational significance — apply now!