João Santos modernized data pipelines and deployment workflows for prefeitura-rio/prefect_rj_iplanrio, focusing on reliable CadUnico data ingestion and improved configuration management. He migrated the WhatsApp CadUnico dispatch pipeline to Prefect, introduced a staging environment to reduce validation risk, and expanded configuration capabilities with TOML and YAML support. Leveraging Python, SQL, and Docker, João enhanced deployment automation, logging, and observability, while implementing robust data modeling and partitioned ingestion for SMAS in queries-rj-iplanrio. His work addressed API integration, dependency management, and data quality, delivering more maintainable, testable, and observable systems that support faster, safer deployments and higher data reliability.