Worked on stabilizing the core Customer OS API within the customeros/customeros repository, focusing on backend development and API reliability using Go. Addressed routing and response handling issues, particularly for mailstack domain routing and the organization enrichment endpoint, by fixing a critical bug that reduced API routing failures. Refactored the EnrichPersonResponse structure to inherit from BaseResponse, introducing a standardized response pattern that improved consistency across endpoints and simplified client integrations. Delivered these changes through targeted, low-risk commits, enhancing maintainability and reliability for downstream systems. Demonstrated skills in API development and backend engineering, with an emphasis on robust, maintainable Go code.