How to Build a SaaS MVP in a Weekend with Next.js 15
A step-by-step blueprint for shipping a working SaaS product in 48 hours — from idea to deployed product with auth, payments, and a real database.
Every successful SaaS started as a scrappy weekend project. The difference between an idea and a live product is execution speed. Next.js 15 combined with Supabase and Paddle lets you ship an entire SaaS in a single weekend.
The Stack
Before you write a single line of code, lock in your stack. Every hour spent evaluating frameworks is an hour not spent shipping.
- Next.js 15 — Full-stack framework, App Router, server components, API routes - Supabase — Postgres database, auth, row-level security, no backend needed - Paddle — Subscription billing, handles VAT/tax globally, instant payout - Vercel — Zero-config deployment, global CDN, free tier
This stack has zero ops overhead. You never manage a server.
Saturday Morning: Foundation (3 hours)
Start with Supabase. Create your project, design your schema, enable Row Level Security. The schema is the most important decision you'll make — get it right before writing UI.
npx create-next-app@latest my-saas
cd my-saas
npm install @supabase/ssr @supabase/supabase-jsCreate your database tables in the Supabase dashboard. At minimum you need: users (handled by Supabase Auth), subscriptions, and whatever your core feature stores.
Saturday Afternoon: Auth (2 hours)
Supabase Auth gives you email/password, Google, and GitHub OAuth in minutes. Use @supabase/ssr to handle cookies properly in Next.js server components.
Don't build auth from scratch. Ever. It's a security nightmare and a time sink. Supabase handles email confirmation, password reset, OAuth tokens, and session refresh automatically.
Saturday Evening: Core Feature (4 hours)
Build the one thing that makes your SaaS valuable. Not the settings page. Not the dashboard. The core feature.
Timebox this to 4 hours. If your core feature takes more than 4 hours, you're building too much. Cut scope.
Sunday Morning: Payments (2 hours)
Add Paddle for subscriptions. Create a pricing page, add the Paddle.js script, and configure a webhook to update your subscriptions table when a user pays.
The webhook is the critical piece — it's how you know someone has paid and should get access.
Sunday Afternoon: Polish + Deploy (3 hours)
- Add a proper landing page hero - Write your pricing table copy - Add error states and loading states - Deploy to Vercel
vercel deploy --prodWhat You've Built
By Sunday evening you have: a landing page, working auth, a paying-ready pricing page, a Stripe/Paddle webhook, a core feature, and a live URL.
The LaunchSrc Shortcut
Instead of starting from zero, grab a Next.js + Supabase starter template from LaunchSrc. You save the Saturday morning setup entirely — walk in with auth, database structure, and deployment already wired.
Want the shortcut instead of another blank project?
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