Minimum 7 years of professional experience in Java programming, Experience with legacy system refactoring or service modernization projects, Hands-on experience with AI-powered development tools (e.g., GitHub Copilot, Claude Code, or similar LLMs), Solid understanding of CI/CD, automated testing, and cloud-native architectures, Ability to design scalable, secure, and maintainable software solutions, Willingness to travel to Krakow for short business delegations as needed, Excellent command of English, both written and spoken, enabling effective communication in an international environment, Residing in Poland required