Backend with Node.js — your first 30 days

You know JavaScript. You can build a frontend that talks to an API. The next move is building the API itself. Here is a 30-day plan to get from frontend literate to backend deployed.

This is not a survey. It is a tight, opinionated sequence. The stack I picked is the most-hired-for backend stack for Node.js engineers: Express, TypeScript, MongoDB, deployed to Render.

Week 1: Node.js basics and your first HTTP server

You will spend most of week one understanding what Node.js actually is. The mental model that matters: Node is JavaScript running on your machine instead of in a browser, with extra capabilities (file system, network) and one big constraint (single-threaded, event-loop driven).

By the end of week one you should be able to:

• Install Node and create a project with npm init
• Understand the role of package.json, node_modules, and npm scripts
• Write a small HTTP server using the built-in http module
• Replace that server with one written in Express
• Add a few routes (GET /, GET /health, POST /echo) and test them with Postman or curl

Week 2: TypeScript, environment, and routes that do work

Production Node.js codebases are almost always TypeScript now. Week two is about getting your tooling production-shaped.

Tasks:

• Set up TypeScript with ts-node for development and a build step for production
• Read environment variables from .env using dotenv — and learn why secrets do not go in git
• Structure your project with separate routes, controllers, services folders
• Build a small CRUD API for a single resource — a to-do, a note, a book — without persistence yet (in-memory storage is fine)
• Add request validation with Zod or express-validator

By the end of this week, your CRUD routes should be type-safe end to end and rejecting bad input with a useful error message.

Week 3: Database, auth, and the parts that make it real

Now the API persists. MongoDB with Mongoose is the easiest place to start; you can switch to Postgres later without losing much.

Tasks:

• Set up a free MongoDB Atlas cluster
• Install Mongoose and define a schema for your resource
• Replace your in-memory CRUD with Mongoose-backed persistence
• Add user signup and login with email + password
• Hash passwords with bcrypt — never store them plain
• Issue JWT tokens, verify them on protected routes

Common mistakes this week: storing passwords plain, leaking the JWT secret in the codebase, forgetting to validate user input on auth routes. All three are interview-question favourites. Get them right now.

Week 4: Deploy and document

A backend you have not deployed is a backend that does not exist. Render and Railway both have free tiers that work for small projects. Pick one.

Tasks:

• Push your code to a public GitHub repo (with a meaningful README)
• Add a build script and a start script in package.json
• Connect the repo to Render or Railway, set environment variables in the dashboard
• Hit your deployed API from Postman — fix the inevitable production-only issues
• Document the API with at least a list of endpoints, their methods, and their request/response shapes

The README is the part most beginners skip. It is also the part that recruiters open. A repo with a clear "what this is / how to run it / what endpoints it exposes" README reads infinitely more professional than the same code with no documentation.

What to skip in your first 30 days

• GraphQL. Learn it later. REST is what most jobs want first.
• Microservices. You do not have a service big enough to split.
• WebSockets. Useful eventually, optional for v1.
• Docker, Kubernetes. Worth learning later — not this month.
• Server-side rendering. Different toolchain (Next.js); not the Node backend specialty.

Where this plan takes you

At the end of 30 days you will have a deployed, type-safe, authenticated REST API on a public URL. You will be able to walk into a junior backend interview and explain every line. That is more than most candidates can do.

After that, the natural next steps are: write tests, add caching, learn PostgreSQL (or pick that as your second database), and build a second API of your own design.

Related: pairing this backend with the right frontend framework