Focusing on practical implementation of GraphQL for API development in real-world environments, on this course you will work through schema design, query execution and service structure in practical scenarios. You will develop skills that increase API efficiency and flexibility, so you can improve API performance, reduce unnecessary data handling and respond to evolving application requirements in the workplace.
GraphQL
Essential GraphQL skills for developers
This course is designed for developers looking to build or enhance their skills in GraphQL API development. Over two days, you will learn how to design schemas, write queries and mutations, and manage data efficiently. The course supports developers at an early to mid-stage of working with APIs, helping you apply GraphQL to improve backend API structure and efficiency and contribute more effectively to modern application architectures.
Learning objectives
- Understand core API and web service principles
- Compare GraphQL with REST approaches
- Build GraphQL services using common languages such as Java, Python or JavaScript
- Develop GraphQL clients using common languages
- Write efficient and flexible GraphQL queries
- Define schemas and data types effectively
- Apply best practices for maintainable solutions
- Use introspection to explore GraphQL services
Key facts
Certification
This is a skills and knowledge-based course with no formal accreditation.
Who it’s for
This course is designed for developers interested in API development and those looking to build practical GraphQL skills.
Prerequisites
This course recommends basic programming experience in JavaScript, Python or Java to support hands-on activities.
Exam information
This course does not include an exam.
Optional extras
There are no optional extras for this course.
Pre-course
No preparation work is required for this course.
Course syllabus
Dive into the detail of the course by looking at the syllabus below.
- Session 1: PREREQUISITES
- APIs
- Web apps
- Web services
- HTTP
- JSON
- Serialisation
- REST APIs
- Session 2: GRAPHQL THEORY
- The problem with REST APIs
- What is GraphQL?
- The composition of a GraphQL service
- Queries and mutations
- Schemas and types
- Session 3: GRAPHQL SERVICES
- Building a GraphQL service with:
- Spring Boot (Java) or;
- Ariadne (Python) or;
- Apollo (JavaScript)
- Session 4: GRAPHQL CLIENTS
- Building a GraphQL client with:
- HttpClient (Java) or;
- GQL (Python) or;
- Apollo (JavaScript)
- Session 5: QUERIES
- Arguments
- Aliases
- Fragments
- Operation names
- Variables
- Directives
- Session 6: TYPES
- Arguments
- Lists
- Non-null fields
- The query and mutation types
- Scalar types
- Enum types
- Union types
- Input types
- Interfaces
- Session 7: MORE GRAPHQL THEORY
- Validation
- Execution
- Introspection
- Best practices
FAQs
This GraphQL training course focuses on applying GraphQL to real API development scenarios. It focuses on applying GraphQL concepts in real-world scenarios, helping you improve backend development efficiency and deliver more flexible, scalable applications.
What is GraphQL used for in development?
GraphQL is used to build APIs that allow clients to request exactly the data they need. This reduces unnecessary data transfer compared to REST-based APIs, reducing unnecessary data transfer and improving application responsiveness.
Is this GraphQL course a good fit for beginners?
This course is suitable for developers who are new to GraphQL but have some experience working with APIs or backend development. It introduces core concepts before moving into hands-on implementation and service development.
How will this course help in my role?
You will gain practical skills in building and managing GraphQL APIs, enabling you to contribute more effectively to backend development tasks and optimise API performance and control data delivery more precisely.
Does the course include practical exercises?
Yes, the course includes practical exercises designed to help you apply GraphQL concepts in realistic scenarios, so you can apply what you learn directly in your role.
What our customers say
“Tarn is an excellent instructor. Everything was clearly communicated. One of the best courses I have attended in recent years.”
Simon, DBA – Government
“Thoroughly enjoyed the course, very informative and a good balance between instruction and practical work.”
Megan, Transport
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