Flightcontrol, a layer on top of AWS, faces a multitude of errors stemming from various sources, including user code, AWS edge cases, and third-party outages. To manage this complexity, a robust error system was developed by senior engineer Camila Rondinini, which involves categorizing errors based on their origin, providing unique codes for easy identification, and offering detailed user-facing information to facilitate resolution. The error handling framework includes a centralized error dictionary, full type safety in the code, and a structured approach to storing errors in a database, allowing for retroactive updates to user-facing content. The system aims to display comprehensive error information to users for expected issues while minimizing details for unexpected errors, which are silently logged for engineering review. Despite acknowledging room for improvement, the implementation supports ongoing refinements and is openly shared for community feedback and collaboration.