Worked on the OpenCTI-Platform/connectors repository, delivering a refactor of the ConnectorTemplate to support dependency injection by accepting configuration and helper objects via the constructor. This approach, implemented in Python, improved testability and configurability across multiple connector types, including external-import, internal-enrichment, internal-export-file, internal-import-file, and stream connectors. By isolating dependencies from internal initialization, the work enhanced maintainability and enabled more robust unit testing. The refactoring established a foundation for future integration of a dependency injection framework, reducing runtime coupling and making the codebase easier to extend. Key skills applied included Python, dependency injection, refactoring, and software design.