Worked on the run-house/runhouse repository to enhance the reliability and cross-platform compatibility of its networking module. Focused on backend development using Python, the work addressed socket error handling by refining the detection of 'address in use' errors, particularly for macOS environments. By updating the errno check to align with macOS semantics, the changes reduced platform-specific failures and improved overall stability for network operations. This targeted bug fix aimed to minimize production incidents related to socket address conflicts. The approach demonstrated attention to detail in cross-platform backend engineering, leveraging Python’s error handling capabilities to deliver more robust and predictable network behavior.