Worked on the substrait-io/substrait-java repository to upgrade the Gradle build configuration, focusing on improving API exposure and dependency management. The approach involved switching the core and isthmus modules from the java plugin to java-library, making API dependencies such as protobuf-java explicit in the module graph. This change clarified the API surface for downstream consumers and reduced the risk of unexpected transitive dependencies. By enhancing build reliability and maintainability, the work ensured that internal and external dependencies were properly managed. The project utilized Gradle and Kotlin, demonstrating skills in build system configuration and effective dependency management within a Java ecosystem.