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

• 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
  
  

Job no. 260520-ZXTF4

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care