During 2025-11 for medhatelmasry/GoodBooks, delivered a Payment Validation Enhancements feature with custom validation attributes to strengthen payment processing, including AmountToPay validation and prevention of overpayment. Completed build stability and framework compatibility work by removing deprecated dependencies, suppressing TFMs warnings, and adding Razor support for MVC to address Razor SDK warnings, resulting in fewer build-time issues. Introduced nullable reference type annotations and targeted refactors to eliminate compiler warnings, improving type safety and maintainability. Fixed routing conflicts in TaxController to ensure correct routing for delete operations, reducing runtime routing errors. Enhanced Chart of Accounts UI stability with additional debugging support for raw JSON data and addressed several static analysis warnings to improve rendering reliability. These changes collectively reduce risk, improve developer velocity, and deliver tangible business value through more reliable payments, cleaner dependencies, and more robust routing and UI rendering.