Over a two-month period, J7n W4r contributed to the Azure/azure-sdk-for-rust and Azure/azure-sdk-for-go repositories, focusing on reliability and feature enhancements for event-driven workloads. In Rust, J7n W4r refactored checkpointing logic to extract offset and sequence numbers directly from AMQP message annotations, replacing a fragile key-based approach and improving downstream processing guarantees. In Go, they implemented a quick retry mechanism for link detachment in the Azure Event Hubs SDK, introducing configurable recovery delays to better handle transient network errors. Their work demonstrated depth in backend development, AMQP protocol handling, and SDK development across both Rust and Go.