Andrew Kao focused on improving the Azure Maps REST modules within the azure-sdk-for-js repository by addressing a critical ESM module file not found error affecting maps-geolocation-rest, maps-render-rest, and maps-search-rest. He resolved the issue by updating module references and ensuring compatibility with ESM environments, which enhanced build reliability and reduced runtime errors for downstream users. Andrew also managed release documentation, updating CHANGELOGs and incrementing version numbers in the README to align with the 2025-03 release. His work relied on Markdown for documentation and demonstrated skills in release management, contributing to a smoother developer experience and more stable SDK releases.