RESTful APIs (Representational State Transfer) are a set of architectural principles for designing networked applications. They use standard HTTP methods like GET, POST, PUT, and DELETE to perform operations on resources, identified by URLs, enabling interoperability between systems.
These APIs are stateless, meaning each request from a client contains all the information needed to process it, improving scalability and reliability. RESTful design emphasizes uniform interfaces, resource identification, and the use of standard data formats such as JSON or XML.
- Use HTTP methods consistently for CRUD operations
- Design stateless, cacheable interactions between client and server
- Structure endpoints around resources using clear, hierarchical URLs
- Return appropriate HTTP status codes for responses
- Support content negotiation and versioning
RESTful APIs are widely used in web development, cloud services, and mobile backends. They are foundational in building scalable microservices architectures and integrating third-party services.
Professionals with this skill typically work as backend developers, API engineers, or full-stack developers. They are expected to design, document, secure, and test APIs using tools like OpenAPI (Swagger), Postman, or REST Assured. Knowledge of authentication methods (OAuth, API keys), rate limiting, and error handling is essential for robust implementations.
