Nathan contributed to both the lizongying/homebrew-cask and iina/iina repositories, focusing on stability and user experience improvements. He implemented a stable download URL and enhanced packaging management for the Retcon cask, ensuring reliable updates and smoother package maintenance using Ruby. In the iina/iina project, Nathan addressed window management by honoring user preferences for opening files in new windows and preventing duplicate windows for identical URLs, leveraging Swift for macOS development. His work demonstrated a solid grasp of application development and DevOps practices, delivering targeted solutions that improved reliability and usability within a concise, well-scoped engineering timeframe.