Worked on the Shopify/worldwide repository to implement postal code typing support, introducing a zip_type attribute in Worldwide::Region to classify postal codes as NUMERIC, ALPHANUMERIC, or NUMERIC_AND_PUNCTUATION. This backend development effort, using Ruby and Markdown, enables mobile devices to select appropriate keyboards for user input, improving the overall input experience and data consistency. The work also included aligning documentation and CHANGELOG entries to ensure accurate naming conventions, supporting better internationalization and release processes. Focused on code quality and documentation, the contribution addressed both technical and user experience aspects within a concise, well-defined project scope over one month.