Worked on the SkinsRestorer/SkinsRestorer repository to refactor MineSkin API key handling, focusing on improving integration reliability and maintainability. The approach involved centralizing the logic for API key management and utilizing Java’s Optional.ifPresent to streamline the process, which reduced boilerplate code and minimized the risk of null-related bugs. This refactoring preserved the existing behavior of the Authorization header, ensuring compatibility with current external integrations while laying the groundwork for safer future enhancements. The work demonstrated skills in API integration, Java, and code refactoring, emphasizing maintainable engineering practices and careful attention to external API contract stability throughout the process.