Worked on the apache/avro repository to address a critical issue in the JavaScript Avro schema parser, focusing on correct namespace inheritance for nested types. Applied JavaScript development and schema parsing expertise to refactor the options handling, ensuring that registry and logicalTypes were preserved by reference across recursive calls, which eliminated shared-state bugs. Developed and integrated comprehensive unit tests to validate namespace inheritance and accurate resolution of type references, enhancing parser reliability. This work improved the correctness of schema parsing and contributed to safer data interchange. Emphasized robust testing and careful code structure to reduce regression risk and support maintainability.