What if a city could run as a GraphQL server? In this talk, we model San Francisco as a modular GraphQL runtime powered by Viaduct. Instead of stitching together microservices or configuring external gateways, we organize zoning, building permits, transit, and census data as domain modules inside a single distributed graph engine. Using real public datasets from the City of San Francisco and the U.S. Census, we demonstrate how tenant modules compose into a unified schema, how execution is coordinated across domain boundaries, and how teams can evolve parts of the graph without central bottlenecks. We introduce a lightweight Skills SDK that abstracts runtime configuration and enforces clear ownership rules, making modular graph design approachable. Finally, we connect an AI client to the server to demonstrate structured, explainable reasoning over live city data. All demo code and schema modules will be open sourced for attendees to explore and extend.
ConfrariaTech, Founder
Jean Lucas is a Developer Advocate focused on distributed systems and GraphQL runtime architecture. He works on making complex graph platforms like Viaduct approachable through clear abstractions and open-source examples. Based in Brazil, he also founded ConfrariaTech, a community of over 1,000 technology leaders, where he facilitates discussions on architecture and emerging technologies.
Join two transformative days of expert insights and innovation to shape the next decade of APIs!