Build a SaaS in a Weekend with Vibe Coding (2026)

Let's be honest about what we're doing here

Traditional software development takes months to learn. You'd spend weeks memorising syntax, debugging mysterious errors, and wondering why your function returns undefined. That world still exists — but you don't have to start there.

Vibe coding flips the model. Instead of learning syntax first and then building things, you describe what you want to build and let AI generate the implementation. Your job is to be a good director: clear about requirements, curious enough to understand what's happening, and willing to iterate when things aren't right.

By the end of this weekend, you'll have a real, deployed web application with a working database. It won't be perfect. But it will be yours — and you'll have shipped something real.

What you're building: a waitlist app

We're going to build a waitlist landing page — the classic "coming soon" page that collects email signups. It sounds simple, but it teaches you every fundamental skill:

• Setting up a Next.js project and running it locally
• Connecting a database (Supabase) to store email addresses
• Building a form that actually works
• Deploying to the internet on Vercel

These four skills are the foundation of every SaaS you'll ever build. Master them this weekend and the rest is just layering on complexity.

Day 1, morning: Set up your tools (2 hours)

Step 1: Install Cursor

Cursor is your AI-powered code editor. Think of it as a word processor where you can highlight any text, say "rewrite this to do X instead", and it actually works. Download it free from cursor.com.

When you open Cursor for the first time, it'll ask you to sign up. Do it. The free tier gives you plenty to work with. If you're asked which AI model to use, pick Claude Sonnet — it's reliable and fast.

Step 2: Install Node.js

Node.js is the engine that runs your app locally on your computer. Go to nodejs.org and download the LTS version. Run the installer — it's a standard next-next-finish install.

To check it worked, open a terminal (on Mac: press Cmd+Space, type "Terminal", hit Enter) and type:

node --version

You should see something like v20.x.x. If you do, you're good.

Step 3: Create a Supabase account

Supabase is your database. It stores all the email addresses your waitlist collects. Go to supabase.com, sign up for free, and create a new project. Call it "my-waitlist" and pick a region close to you.

When your project is created, go to Settings → API. You'll see two things: a Project URL and an anon/public key. Copy both — you'll need them shortly.

Step 4: Create a Vercel account

Vercel hosts your app on the internet. Go to vercel.com, sign up (connect your GitHub account if you have one — if not, create one first at github.com). Vercel's free tier is more than enough for this project.

Day 1, afternoon: Create your project (3 hours)

Step 5: Bootstrap the app with AI

Open Cursor. Press Cmd+Shift+P (or Ctrl+Shift+P on Windows), type "Terminal" and open a new terminal. Now type this command:

npx create-next-app@latest my-waitlist --typescript --tailwind --app --yes

This creates a new Next.js project with TypeScript and Tailwind CSS (a styling library). Wait for it to finish, then type:

cd my-waitlist code .

This opens your project in Cursor. You'll see a bunch of files. Don't panic — you don't need to understand all of them right now.

Step 6: Your first AI prompt

In Cursor, press Cmd+I to open the AI chat panel. Type this prompt — copy it exactly:

Hit Enter. Watch Cursor rewrite your page. When it finishes, go back to your terminal and run:

npm run dev

Open your browser to localhost:3000. You should see your landing page. If it looks ugly, just go back to Cursor and say "make the design more polished, more professional" — and watch it update.

Step 7: Connect Supabase

Now let's make the email form actually work. First, install the Supabase library. In your terminal:

npm install @supabase/supabase-js

Create a file called .env.local in your project root and add your Supabase credentials:

NEXT_PUBLIC_SUPABASE_URL=your-project-url-here NEXT_PUBLIC_SUPABASE_ANON_KEY=your-anon-key-here

Now use this prompt in Cursor:

Step 8: Create the database table

Go to your Supabase dashboard, click SQL Editor, and run this:

create table waitlist (
  id uuid default gen_random_uuid() primary key,
  email text not null unique,
  created_at timestamptz default now()
);

Now test your form. Enter an email address and click submit. Go back to Supabase → Table Editor → waitlist. You should see your email there. That's your database working.

Day 2: Polish and deploy

Step 9: Make it yours

Before deploying, personalise it. Use prompts like these in Cursor:

Step 10: Deploy to Vercel

First, push your code to GitHub. In Cursor's terminal:

git init git add . git commit -m "first commit" gh repo create my-waitlist --public --push

(If you don't have the GitHub CLI, install it from cli.github.com, or just go to github.com and create a repo manually, then follow the instructions to push your code.)

Now go to vercel.com/dashboard, click Add New → Project, and import your GitHub repository. Before deploying, click Environment Variablesand add your two Supabase environment variables (the same ones from your .env.local file).

Click Deploy. In about 60 seconds, Vercel will give you a URL like my-waitlist.vercel.app. Open it. Your app is live on the internet.

What you just learned

Take a moment to appreciate what you actually built this weekend:

• A frontend built with Next.js and Tailwind CSS
• A backend API (Supabase handles this automatically)
• A database storing real user data
• A deployed production app accessible from anywhere in the world

A year ago, this would have taken a junior developer several weeks. You just did it in a weekend, without writing most of the code yourself. That's what vibe coding is.

You're not done learning — you're just getting started. The next step is understanding the tools that make this possible at scale. Read The Vibe Coder's Toolkit to see the full landscape of services that replace tens of thousands of lines of code.

Common problems and how to fix them

Things will go wrong. That's normal. Here's how to handle the most common issues:

• The page won't load locally: Make sure you ran npm run dev in the correct folder. Your terminal should be inside the my-waitlist directory.
• The form submission fails: Check your Supabase credentials in .env.local. Make sure the table name is exactly waitlist.
• Vercel deploy fails: Check the build logs. Usually it's a missing environment variable. Copy your Supabase credentials into Vercel's environment variables section.
• The AI code doesn't work: Paste the error message back into Cursor and say "I got this error, fix it". AI is excellent at debugging its own output.

What's next in the academy

This project was your foundation. The next four guides build on it:

• Guide 2: The Vibe Coder's Toolkit — The services that replace 10,000 lines of code
• Guide 3: Building Your Portfolio — 5 projects that get you hired
• Guide 4: The 30-Day Challenge — From zero to job-ready in a month
• Guide 5: Career Change to Vibe Coding — The honest guide

When you're ready to see what kinds of jobs use these skills, browse the vibe coding job listings — many of them are explicitly looking for the Next.js + Supabase + Vercel stack you just learned.