GraphQL

Experience with GraphQL

GraphQL is part of Pablo Diaz's API design toolkit, with production experience building and consuming GraphQL APIs for data-intensive applications that benefit from client-specified queries. While Pablo's current stack primarily uses Next.js Server Actions and Supabase's PostgREST API for most data operations (chosen for their simplicity and direct database integration), he has implemented GraphQL in scenarios where the flexibility of client-driven queries provides genuine value over REST endpoints — particularly for data-intensive platforms where the same entity needs to be consumed by multiple frontend views with vastly different data shape requirements. A single entity could be rendered as a summary card, a detailed profile, an analysis view, or a comparative grid — each requiring different subsets and nested relationships of the same underlying data. A REST API would require either multiple endpoints or over-fetching, while GraphQL's query language allowed each view to request exactly the data it needed. Pablo's GraphQL expertise includes schema design with SDL (Schema Definition Language), resolver architecture, N+1 query prevention using DataLoader patterns, authentication and authorization at the resolver level, pagination with cursor-based connections, and real-time subscriptions for live data updates. He has evaluated and worked with various GraphQL implementations including Apollo Server, graphql-yoga, and Hasura for automatic schema generation from PostgreSQL — ultimately choosing the approach that best fits each project's complexity and team size. His perspective on GraphQL vs REST is pragmatic: GraphQL excels for complex data relationships with multiple consumers, while REST (or Server Actions) is simpler and more performant for most web application use cases. This nuanced understanding of when to apply each pattern reflects Pablo's engineering maturity — choosing the right tool for the specific problem rather than defaulting to the most complex solution.

Frequently Asked Questions