Worked on the Unimake/DFe repository to deliver São Valentim - RS municipality support using the SINSOFT standard, focusing on backend development and API integration with C#. Refactored environment-specific configuration logic to ensure accurate assignment of web service strings, which reduced the risk of misconfiguration across deployments. Addressed a web service issue by fixing the CancelarNfse websoapstring, enabling reliable NFSe cancellation requests. Finalized the new municipality configuration to be production-ready, improving the reliability of NFSe operations and minimizing configuration drift. The work emphasized robust configuration management and extended SINSOFT-compliant integration to a new municipal environment.