Worked on enhancing the receipt allocation workflow within the Sales module of the medhatelmasry/GoodBooks repository, focusing on improving invoice visibility and allocation accuracy. Developed a feature in C# using ASP.NET that displays relevant invoices during the allocation process and incorporates outstanding invoices into the allocation model, enabling more precise and efficient receivables processing. Strengthened the back end by implementing robust error handling and audit-friendly logging, which supports better traceability and troubleshooting. The work emphasized API integration and back end development, delivering a targeted solution that streamlines the allocation flow and supports more accurate financial operations within the application.