Khamasaki worked on the grpc/grpc repository, delivering a performance-focused feature for the Objective-C library by enabling configurable dispatch behavior in the GRPCCompletionQueue. Using Objective-C and leveraging concurrency management skills, Khamasaki exposed an environment variable that allows users to select a custom dispatch queue, decoupling the queue from the global default and supporting workload-specific tuning. Profiling demonstrated measurable latency reductions, aligning with ongoing performance optimization goals. The implementation maintained compatibility and included clear documentation to minimize user impact. This work enhanced the configurability and maintainability of the GRPCCompletionQueue, reflecting a thoughtful approach to performance engineering within the codebase.