Worked on enhancing asynchronous programming and observability in Java-based systems over a two-month period. Developed coroutine-based gRPC stub support for the spring-projects/spring-grpc repository, introducing a CoroutineStubFactory that enables seamless integration of Kotlin coroutines into Spring Boot applications. This feature improved developer ergonomics by allowing coroutine-based client code and was validated through targeted tests. Additionally, contributed to the micrometer-metrics/micrometer repository by improving error handling in metrics collection for virtual threads, specifically by catching IllegalArgumentException during MXBean retrieval. This change increased the reliability of metrics for Loom-based workloads, reducing incident risk without impacting compatibility. Technologies used included Java, Kotlin Coroutines, and Spring Boot.