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Programming Concepts Intermediate

What is API Design?

The practice of designing application programming interfaces that are consistent, intuitive, and maintainable for developers to consume.

Good API design follows principles like consistency (uniform naming conventions, error formats), discoverability (logical resource naming, HATEOAS links), versioning (URL path, header, or query parameter strategies), proper HTTP method usage (GET for reads, POST for creates, PUT for updates, DELETE for removes), meaningful status codes, pagination for collections, filtering and sorting parameters, and comprehensive documentation. RESTful conventions, OpenAPI/Swagger specifications, and developer experience (DX) are central concerns. Well-designed APIs reduce integration time, minimize support burden, and enable ecosystem growth.

Related Terms

Concurrency
The ability of a program to manage multiple tasks that can make progress during overlapping time periods.
Hash Table
A data structure that maps keys to values using a hash function, providing average O(1) time complexity for lookups, insertions, and deletions.
Factory Pattern
A creational design pattern that provides an interface for creating objects without specifying their exact classes.
Thread
The smallest unit of execution within a process, allowing concurrent operations to run within a single program.
Big O Notation
A mathematical notation that describes the worst-case performance of an algorithm as input size grows.
Object-Oriented Programming (OOP)
A programming paradigm that organizes software design around objects containing data and behavior.
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