GraphQL Short Course

Learn GraphQL, the modern API query language developed by Facebook that lets clients request exactly the data they need. GraphQL solves the over-fetching and under-fetching problems of REST APIs, making applications faster and more efficient. This course covers schema definition, queries, mutations, variables, resolvers, fragments, and subscriptions.. Master graphql through bite-sized, swipeable learning tiles — designed for busy people who want to learn on the go.

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About This GraphQL Course

This GraphQL short course on SkillTiles breaks down everything you need to know into 10 structured milestones, each packed with bite-sized learning tiles you can swipe through in under 15 seconds each.

Whether you're a complete beginner or looking to refresh your knowledge, this online graphql course uses AI-powered content to adapt to your learning pace. Each tile delivers a focused concept, example, or quiz — making it perfect for commutes, coffee breaks, or quick study sessions.

Covering 70 key topics across 10 milestones, this course takes you from foundations to practical application. Earn badges as you complete each milestone and track your progress on your learning dashboard.

Course Curriculum

GraphQL Fundamentals

Queries, mutations, and schemas

REST vs GraphQLschema definitionqueries and fieldsmutationsvariables and argumentsresolversfragments and subscriptions

Schema Design

Design effective GraphQL schemas

type definitionsscalar typesobject types and fieldsinput typesenumsinterfaces and unionsschema-first vs code-first

Queries & Mutations

Read and write data with GraphQL

query structurenested queriesarguments and variablesaliasesmutations for writesinput validationerror handling

Resolvers

Connect schema to data sources

resolver function anatomycontext and authenticationparent resolversbatching with DataLoaderN+1 problem solutionserror handling in resolversasync resolvers

Advanced Features

Subscriptions, directives, and federation

subscriptions for real-timecustom directivespagination (cursor vs offset)file uploadsschema stitchingApollo Federation basicspersisted queries

Client-Side GraphQL

Consume GraphQL APIs in frontend

Apollo Client setupuseQuery and useMutationcaching strategiesoptimistic UI updateserror and loading statescode generation (codegen)urql alternative

GraphQL Tooling

Tools that improve development

GraphQL Playground/Explorerschema lintingtype generationmocking serverstesting GraphQLmonitoring and tracingdocumentation generation

GraphQL Security

Protect your GraphQL API

query depth limitingquery complexity analysisrate limitingauthentication patternsauthorization strategiesintrospection in productioninjection prevention

Performance

Optimize GraphQL at scale

query batchingresponse cachingDataLoader optimizationlazy loading fieldsCDN caching with GraphQLmonitoring query performanceschema design for performance

Production GraphQL

Run GraphQL in production

schema versioning and evolutionbreaking change detectionAPI gateway patternsmicroservices with GraphQLmigration from RESTobservability and loggingGraphQL at scale case studies