Web Design vs Web Development: The Front-End / Back-End Map

"Web design" and "web development" get used interchangeably, and that confusion quietly causes a lot of mis-hires and mis-scoped projects. They're related, they overlap, but they're not the same discipline. Here's the clean separation I use.

Web design — the front-end

Web design is the production and maintenance of the website's experience — usually called the front-end, and it partially overlaps development. It's everything the user perceives and interacts with. It includes:

• Web design itself — the visual layer.
• Interface design — how controls and layout work.
• Authoring — producing the actual pages.
• User experience (UX) — how the whole thing feels to use.
• Search engine optimisation (SEO) — making it discoverable.

If it's about how the site looks, feels, and is found, it's design.

Web development — the back-end

Web development is the work of building the website for the internet or an intranet — usually called the back-end, and it spans a huge range, from a single static page of plain text to complex web applications. It includes:

• Web engineering and web content development.
• Client liaison — translating what a client needs into what gets built.
• Client-side and server-side scripting — the logic that makes things actually work.
• Web server and network security configuration.
• E-commerce development.

Among professionals, "web development" usually refers to the non-design aspects of building sites. And a key enabler worth knowing: Content Management Systems (CMS) exist so that content can be updated by people with only basic technical skills — decoupling "change the words" from "change the code."

The throughline

The cleanest way to hold it: design owns how the site looks, feels, and is found (front-end); development owns how it's built, runs, and stays secure (back-end). They overlap in the middle, and the best web people speak both — but knowing which half a problem lives in is the difference between hiring the right person and scoping the right project.