2.0 Enterprise Node.js Refactor: Routes, Controllers, Services (Deep Guide)

2.0 Enterprise Node.js Refactor: Routes, Controllers, Services (Deep Guide) #nodejs #expressjs

Level up your backend! In this episode, we refactor our simple one-file server into a clean, enterprise Node.js structure using Express—with routes, controllers, and services. You’ll see what to write, why to write it, and the benefit for scalability, teamwork, and interviews. We continue using FakeStoreAPI so you get real-looking data without DB setup.

What you’ll learn -
Why enterprise projects separate routes → controllers → services
How to keep controllers thin and services reusable
Mounting feature routes cleanly under /api/*
Keeping server startup separate from app config (test-friendly)

Commands used -
mkdir src src/routes src/controllers src/services
npm i express axios
npm i -D nodemon
npx nodemon server.js

Folder structure -
src/
app.js
routes/
productRoutes.js
controllers/
productController.js
services/
productService.js
server.js

Next video -
Single product endpoint /api/products/:id + centralised error handling & 404 handler.

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#nodejs #expressjs #backend #cleanarchitecture #softwarearchitecture #restapi #javascript #webdevelopment #apidesign #fakestoreapi #codingtutorial #interviewprep #indiandevs #mern #scalablecode