Worked on the aws/s2n-quic repository to refactor TCP worker state polling by introducing a trait-based approach that separates polling logic from the worker lifecycle. This involved creating a PollBehavior trait and a DefaultBehavior implementation, which enhanced the modularity and testability of TCP worker state management. The refactor, implemented in Rust with a focus on concurrency and networking, enables safer experimentation and lays the groundwork for future performance improvements. By decoupling core logic, the changes support more flexible feature development and easier maintenance, reflecting a thoughtful approach to system programming and codebase evolution within the project’s networking components.