Worked on the sift-stack/sift repository to deliver two backend features focused on automation and governance. Developed support for User Defined Functions and External Rules by defining UDF structures, managing dependencies, and updating rule protocols to distinguish external rules and return created identifiers. Enhanced the User Group Management API by extending Protocol Buffer definitions and generating Python gRPC client and server stubs, enabling more granular management of user groups, assets, and associated users. All changes were implemented using Python and protobuf, with clean, well-documented commits and no customer-facing incidents, reflecting a methodical approach to API design and backend development.