GraphQL APIs
Free Intermediate course · 10 lessons · 2 weeks · Certificate on completion
Design flexible APIs clients love. Schemas, resolvers, and the performance traps to avoid. Across 10 lessons you'll move from fundamentals to a portfolio-ready outcome — at your own pace, with quizzes after each lesson and a final exam to certify your mastery.
What you'll learn
- REST vs GraphQL
- Designing a schema
- Queries, mutations, subscriptions
- Writing resolvers
- Solving the N+1 problem
- Auth and field permissions
Skills you'll pick up
- REST vs GraphQL
- Designing a schema
- Queries, mutations, subscripti
- Writing resolvers
- Solving the N+1 problem
- Auth and field permissions
Tools covered
- GraphQL
- Real-world projects
- Quizzes
- Final exam
Course modules
Module 1: REST vs GraphQL
Module 1 of GraphQL APIs. 3 lessons · 3h
Module 2: Designing a schema
Module 2 of GraphQL APIs. 3 lessons · 3h
Module 3: Queries, mutations, subscriptions
Module 3 of GraphQL APIs. 3 lessons · 3h
Module 4: Writing resolvers
Module 4 of GraphQL APIs. 1 lessons · 1h
Lessons in this course
- REST vs GraphQL
- Designing a schema
- Queries, mutations, subscriptions
- Writing resolvers
- Solving the N+1 problem
- Auth and field permissions
- Caching strategies
- Consuming GraphQL on the client
- GraphQL: Deep dive 9
- GraphQL: Deep dive 10
Instructor
Peter Osei — API Engineer
Peter Osei is a API Engineer with years of hands-on experience teaching GraphQL to thousands of learners worldwide.
Certificate
Finish every lesson and pass the final exam to earn a free, verifiable Learnera certificate for GraphQL APIs. It can be downloaded as a PDF and shared on LinkedIn.
Career outcomes
Median global salary $120,000 per year · median India salary ₹17,00,000 per year · 169,565 open roles worldwide
- GraphQL Specialist
- Senior GraphQL Lead
- GraphQL Consultant
Frequently asked questions
Is the GraphQL APIs course free?
Yes. Every Learnera course, including GraphQL APIs, is completely free — lessons, quizzes, the final exam, and the certificate.
How long does GraphQL APIs take?
10 lessons, typically completed in 2 weeks at a comfortable pace.
Do I get a certificate?
Yes — pass the final exam and you receive a free, verifiable certificate you can share on LinkedIn.