Michael Ernst worked on internal infrastructure improvements for the uber/NullAway repository, focusing on modernizing the Gradle build system. He migrated build scripts to use current Gradle APIs, specifically removing deprecated buildDir usage to enhance build compatibility and maintainability. This update, implemented entirely in Gradle, did not introduce user-facing changes but improved the reliability of the build process and reduced the risk of future deprecations. By refining build configuration and aligning with modern tooling, Michael supported faster CI and build cycles. His work demonstrated depth in build tooling and infrastructure refactoring, contributing to the long-term health of the project’s platform.