Worked on the apple/containerization repository to enhance the BidirectionalRelay component, focusing on improving throughput, reliability, and teardown stability. Implemented non-blocking I/O and backpressure mechanisms using Swift and Grand Central Dispatch, replacing synchronous write calls with asynchronous operations to prevent head-of-line blocking and resource leaks. Introduced per-relay serial queues to isolate blocked connections, ensuring that issues in one relay do not impact others. Improved resource management during teardown by resuming suspended reads before cancellation and handling file descriptors more robustly. The work demonstrated strong skills in asynchronous programming, concurrency, and socket programming, resulting in a more stable and scalable vsock proxy.