During November 2025, Evin Kim enhanced the receipt allocation workflow in the medhatelmasry/GoodBooks repository, focusing on the Sales module. Evin implemented a feature in C# using ASP.NET that displays invoices during allocations and incorporates outstanding invoices into the allocation model, improving both accuracy and speed for receivables processing. The work included robust API integration and introduced improved error handling and audit-friendly logging, which strengthened traceability and troubleshooting within the allocation flow. Over the course of the month, Evin delivered a single, well-scoped feature that addressed a specific business need, demonstrating depth in back end development and workflow optimization.