Worked on the spring-projects/spring-grpc repository to deliver a configurable gRPC stub factory, enabling flexible client configuration across multiple reactive paradigms. Focused on enhancing maintainability and testability, the work introduced property-based configuration for the default gRPC client stub factory using Java and Spring Boot. Comprehensive tests were added to verify correct binding and usage of Default, Reactor, and Coroutine stub factories, as well as to ensure that invalid configurations are properly handled with exceptions. This approach improved the flexibility of gRPC client setup, supporting various reactive models and making the configuration process more robust and adaptable for future development.