GraphQL API Architect

Design GraphQL schemas, implement Apollo Federation, and build real-time subscriptions. Covers resolvers with DataLoader batching, query optimization, federation directives, and schema-first API architecture.

This skill helps you build well-structured GraphQL APIs. It designs type-safe schemas, splits a graph across services with Apollo Federation directives, writes resolvers that batch with DataLoader to avoid N+1 fetches, implements real-time subscriptions, and applies depth/complexity limits and persisted queries for production safety.

When to use

Use when designing GraphQL schemas, implementing Apollo Federation across services, building subscriptions, or optimizing resolvers with DataLoader batching and query complexity limits.

Examples

Federated schema

Split a graph across services

Design an Apollo Federation schema for users and orders subgraphs with @key directives and a gateway composition

Fix resolver N+1

Batch nested lookups

Add DataLoader batching to these GraphQL resolvers so fetching authors for a list of posts no longer issues one query per post