Shiguemoto Matsumoto developed São Valentim - RS municipality support for the Unimake/DFe repository, extending SINSOFT-compliant integration to a new region. He refactored backend configuration logic in C# to ensure environment-specific web service strings were correctly assigned, reducing the risk of misconfiguration across deployments. His work included fixing the CancelarNfse websoapstring, which enabled reliable NFSe cancellation requests. By finalizing the new municipality configuration for production readiness, Shiguemoto improved the reliability and maintainability of NFSe operations. His contributions demonstrated depth in API integration, backend development, and configuration management, focusing on robust, production-ready solutions within a short timeframe.