Build Your First Web App
The capstone course. You'll build a complete SaaS web application — user authentication, a real database, Stripe billing, transactional email, and deployment to a custom domain. Ten lessons. One working product.
What you'll ship
A complete SaaS product with user auth, a real database, Stripe billing, transactional email, and a custom domain.
Next.js 15
Full-stack React
Supabase
DB + Auth
Stripe
Payments
Resend
Tailwind
Styling
RLS
Auth + security
Vercel
Deploy
TypeScript
Type safety
Course outline
Free — no account needed
Project Blueprint — What You're Building
The architecture, the stack, and a clear picture of what you'll ship
Project Setup — Next.js + Tailwind + Supabase
Bootstrap the project, wire in your database, and see your first page render
Your First Page — Nav, Hero, and CTA
Build the landing page with Tailwind and Next.js App Router components
Full course — $99 one-time
Database Schema — Tables and Row Level Security
Design your tables, write migrations, and lock down access with RLS
Auth — Sign Up, Log In, and Protected Routes
User accounts with Supabase Auth, sessions in cookies, and server-side route protection
Core Feature — Dashboard and Link Management
Build the authenticated dashboard: add, reorder, and toggle links
Stripe — Subscriptions and Webhooks
Accept payments, handle subscription events, and gate features behind a paid plan
Transactional Email with Resend
Welcome emails on signup and payment receipts — wired to real events
Deployment — Vercel, Domain, and Production Environment
Take your app from localhost to the internet in under 30 minutes
Launch Checklist — Ship It and Get Your First Users
The final checks before going public and the strategies that get first users fast
Get the full course
10 lessons covering auth, database, Stripe payments, email, and deployment — plus a shareable certificate.
Written by the RadarTrek editorial team · Reviewed June 2026
About this course
This capstone course brings together HTML, CSS, JavaScript, React, Supabase, Stripe, and Vercel into one end-to-end project — a fully deployed web application with user authentication, a database, and payment processing. If you have worked through the foundations and want to experience what it feels like to build and ship a real product, this is the course that ties everything together. You will build a web app from zero to live URL, with every layer of the modern stack working in concert.
Building your first full-stack web application is a milestone that transforms you from someone learning programming into someone who can actually ship software. This course is designed for developers who have completed the prerequisite courses and want to move from exercises to a real deployment. After completing it you will have a live application on a public URL, a GitHub repository to show employers, and the confidence to start your next project independently.
Frequently asked questions
What do I need to know before taking this course?
This course assumes you are comfortable with JavaScript fundamentals, React components and hooks, basic Supabase, and that you have deployed at least one project to the web before. The recommended prerequisite sequence is: Think Like a Programmer → How the Web Works → HTML → CSS → JavaScript → React → Supabase for Builders → this course. Jumping ahead without that foundation will make the project difficult to follow.
What application do I build in this course?
You build a subscription-based SaaS application: user sign-up and login via Supabase Auth, a dashboard with data stored in PostgreSQL, Stripe Checkout integration for payments, and webhook handling for subscription events. This represents the core architecture of the vast majority of commercial SaaS products — once you have built this template, adapting it to your own product idea is a matter of changing the domain-specific features.
Will I have a live application at the end?
Yes — the final lesson covers deployment to Vercel with a custom domain, environment variable configuration, and a post-launch checklist. You will have a real, publicly accessible application with a live URL that you can show in a portfolio, share with users, or continue building. It will not just be running on localhost.
Can I use this project in a job portfolio?
Absolutely — a working full-stack application deployed to production is one of the strongest portfolio pieces you can show a hiring manager. It demonstrates that you understand the full stack: front-end, back-end, database, payments, authentication, and deployment. If you customise the application beyond the tutorial exercises, it becomes even stronger evidence of your ability to build independently.
What if I get stuck during the project?
Getting stuck is part of learning — the goal is to build your ability to unstick yourself. Each lesson ends with debugging tips for the most common problems at that stage. Beyond that, reading error messages carefully, checking the browser console and terminal output, and searching for the specific error message are the professional debugging workflow this course explicitly teaches alongside the code.