Track

Backend & Servers track

HTTP, Node.js servers, REST APIs and persistence: the other side of the request.

javascript track

Ordered the way it's meant to be learned — each lesson assumes the ones before it.

5 lessons live

Servers, APIs & Data

HTTP, REST APIs, persistence and the request/response cycle end to end.

How the Web Works: Clients, Servers & HTTPThe mechanics behind every page you have ever loaded: clients and servers, what really happens when you type a URL, and the requests, responses, methods, status codes and headers that make up HTTP.40 minintermediate
Node.js: JavaScript on a ServerJavaScript beyond the browser: how Node runs your code with V8 plus host APIs, the REPL and ESM modules, process.env for secrets, and your first HTTP server with honest routing.45 minintermediate
REST APIs & JSON over HTTPServing data instead of pages: design a notes API from resource nouns and method verbs, answer with honest status codes, parse bodies and path parameters, then consume your own API from the browser.45 minintermediate
Persistence: Files & DatabasesMemory forgets everything at the next restart. Give your API data that outlives the process - first a JSON file written atomically, then real SQL with SQLite - all behind a repository seam that keeps the API itself untouched.45 minintermediate
Backend Capstone — Build a Complete APIBuild the Bookmarks API end to end: design the endpoints, validate every request, persist to a JSON file with atomic writes, test the handlers, and consume the API from a browser page.50 minintermediate

Part of the Web Developer path