GraphQL Query & Mutation Architecture, A Production Deep Dive

#api #architecture #dotnet #systemdesign

I’m sharing what I learned building a production GraphQL API: how to design query and mutation architecture that scales without losing consistency or clarity. This article walks through a code-first HotChocolate implementation using BatchDataLoader, CQRS, and the transactional outbox pattern, with real examples from an EMR system serving three portals via a single schema.

Key takeaways:
— How to structure GraphQL queries and mutations cleanly in a .NET code-first approach
— Using BatchDataLoader to prevent N+1 problems while keeping resolvers maintainable
— Applying CQRS to separate read and write concerns without complicating the API layer
— Pairing writes with a transactional outbox pattern for reliable, production-grade event delivery

Read the full article here: https://erwinwilsonceniza.qzz.io/blogs/graphql-query-mutation-architecture-a-production-deep-dive