Reusable solutions to commonly occurring problems in software design, including creational, structural, and behavioral patterns that help developers write more maintainable and scalable code. Organizations adopt it to address specific technical or business challenges in their environments.
Software Design Patterns
Software Design Patterns are named, reusable solutions to problems that recur when you design software. Popularized by the “Gang of Four” book in 1994, they give developers a shared vocabulary, Factory, Singleton, Observer, Strategy, Adapter, so a design intent can be communicated in a word instead of a paragraph. They are not code you copy, but proven shapes you adapt to your own context.
- Creational patterns - Control how objects are constructed, such as Factory, Builder, and Singleton.
- Structural patterns - Compose objects and classes into larger structures, such as Adapter, Facade, and Decorator.
- Behavioral patterns - Describe how objects collaborate and share responsibility, such as Observer, Strategy, and Command.
- Shared vocabulary - The real payoff is communication, patterns let teams describe designs precisely and consistently.
Design patterns matter to API work because APIs are full of them, even when nobody names them out loud. Pagination, retries, adapters that wrap a legacy service, observers that fan out webhooks, these are patterns applied to interface design. Recognizing them is what lets me talk about consistency and governance across an estate, and it is the smaller sibling of the software design architectural patterns that shape whole systems. A team fluent in patterns produces APIs that are more predictable, easier to reason about, and easier for both humans and agents to consume.
Referenced on the API Evangelist blog
Where this standard shows up across sixteen years of my writing at apievangelist.com — how it fits into API design, governance, and the agentic turn.
API Is Not Just REST
2018-02-03
API-First Development
2019-09-17
