API (Application Programming Interface) development involves designing, building, and maintaining interfaces that allow different software applications to communicate seamlessly. It includes creating RESTful or GraphQL APIs using technologies like Node.js, Express, and SQL, ensuring secure, scalable, and efficient data exchange.
A well-structured API enables smooth integration, enhances performance, and supports multiple platforms, including web and mobile applications. Key aspects of API development include authentication (OAuth, JWT), data validation, error handling, and versioning to ensure reliability and maintainability.
By implementing best practices, such as rate limiting, caching, and documentation (Swagger, Postman), API development ensures a seamless developer experience while optimizing system performance and security.