Alex Batchelor enhanced the azure-sdk-for-net repository by developing a new API feature that allows ProtectKeysWithAzureKeyVault to accept Uri-based key identifiers, streamlining integration with Azure Key Vault. Working primarily in C# with ASP.NET Core, Alex updated the public API surface, revised documentation, and refactored unit tests to ensure reliability and maintainability. The technical approach emphasized consistent use of mock credentials and improved the SDK’s security posture by supporting Uri-based keys. Although no bugs were fixed during this period, the work demonstrated depth in API design and cryptography, focusing on developer experience and release readiness for Azure-integrated applications.