Sh Johnson focused on backend development and refactoring for the trade-tariff-frontend repository, addressing a targeted bug in the Goods Nomenclature geographical filtering logic. By correcting the mapping of country names to their corresponding identifiers, Sh improved the accuracy of green lanes data and ensured that frontend filtering now aligns with the underlying GN data model. This Ruby-based fix involved careful API integration and resulted in more reliable user experiences when filtering by geography. The work was delivered as a single, well-documented commit, enhancing maintainability and traceability for future updates while reducing the risk of misclassification in filtered results.