Expected, Java, Spring Boot, Apache Kafka, AWS, Microsoft Azure, Google Cloud Platform

Optional, Kubernetes, AI

About the project, 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 responsibilities, 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

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

Optional, 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 – you can change them thanks to Job Changer application, 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

Recruitment stages, Send your CV, Talk to us about your expectations, Learn more about our projects and choose the best, Start your adventure with Sii!

Sii Sp. z o.o., Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment., , Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

This is how we work,

Java Developer (f/m/x)