Arina Kim developed three backend features across the ohcnetwork/care and bytechefhq/bytechef repositories, focusing on data governance and automation. She implemented a configurable notification data retention policy in ohcnetwork/care, allowing administrators to adjust retention periods without code changes, leveraging Python and Django for flexible configuration management. In bytechefhq/bytechef, she added actions for deleting Baserow table rows and retrieving Google Drive files by ID, integrating these with component handlers and ensuring robust test coverage. Her work demonstrated cross-repository API integration and backend development skills, delivering maintainable solutions that enhance data lifecycle control and automate external service interactions without introducing bugs.