Arina Kim developed three backend features across the ohcnetwork/care and bytechefhq/bytechef repositories, focusing on automation and data governance. She implemented a configurable notification data retention policy in ohcnetwork/care, allowing administrators to adjust retention periods without code changes, using Python and task scheduling. In bytechefhq/bytechef, she added a Baserow row deletion action and a Google Drive file retrieval action, both integrated into component handlers with comprehensive unit tests. Her work demonstrated cross-repository API integration and configuration management, leveraging Django and Java. The features addressed business needs for flexible data management and automation, with well-structured, maintainable code and thorough test coverage.