Mehnaz worked on refactoring the TCP worker state polling logic in the aws/s2n-quic repository, focusing on improving modularity and testability. She introduced a trait-based approach by implementing the PollBehavior trait and a DefaultBehavior, which decoupled the polling mechanism from the worker lifecycle. This Rust-based solution leveraged her skills in concurrency, networking, and system programming to enable safer experimentation and future performance optimizations within the TCP polling path. By restructuring the code in this way, Mehnaz addressed maintainability concerns and laid the groundwork for more flexible feature development, demonstrating thoughtful engineering within a complex system programming context.