I recently launched www.firenation.tech, a platform designed to help users calculate their path to Financial Independence and Retire Early (FIRE). But the most interesting part isn't the financial math—it's that I built the entire production-ready application alone, using the "Vibe Coding" methodology and Google's new Antigravity IDE.​

Here is how I went from idea to deployment without writing boilerplate, and why this stack changes everything for solo founders.

The Stack: Google’s "Antigravity" Ecosystem

To move fast as a team of one, I needed tools that acted like a team of ten. My stack was simple, robust, and AI-native:

• IDE: Google Antigravity (The Agentic Editor)

• Backend/Hosting: Firebase (Auth, Firestore, Hosting)​

• Intelligence: Google Gemini 3 (via Antigravity agents)​

Step 1: Vibe Coding with Antigravity

If you aren't familiar with "Vibe Coding" (a term coined by Andrej Karpathy), it’s the practice of managing AI agents to write code rather than writing it manually.​

Using Antigravity, I didn't start by setting up a React repo. I started by telling the agent:

"Create a modern, responsive web app for financial tracking. Set up a Firebase project configuration and scaffold a dashboard with a sidebar."

Antigravity’s agents didn't just spit out code snippets; they created the files, installed the dependencies, and even opened a browser window to verify the layout. When the navigation bar looked off, I didn't inspect the CSS. I just highlighted it and said, "Make this mobile-responsive and darker." The agent handled the media queries instantly.​

Step 2: The "Backendless" Backend

For a FIRE calculator, data persistence is key. I needed users to save their net worth, income streams, and expense data.

Instead of writing complex API endpoints, I asked Antigravity to:

1. "Create a Firestore schema for user financial data."

2. "Write a Firebase Cloud Function to calculate compound interest based on user inputs."

The IDE integrated directly with the Firebase CLI, deploying the security rules and functions without me ever leaving the editor. The "Pro" here is speed—I saved roughly 15 hours of backend configuration time.​

Step 3: Zero-Cost Deployment

As a platform teaching financial independence, it was poetic to keep my own burn rate at $0.

• Hosting: Firebase Hosting (Free Tier)

• Database: Firestore (Free Tier limits are generous for text data)

• Dev Tools: Antigravity (Currently in preview/beta)

This allowed me to validate the idea without spending a dime—a crucial lesson for any Indie Hacker.​

The Result: Firenation.tech

The site is now live. It features real-time net worth tracking, projection graphs for early retirement, and a curated library of FIRE resources.

But more importantly, it stands as a testament to the Antigravity era. We are no longer just "coders"; we are product conductors. If you have an idea you've been sitting on because you "don't have the time to code it," you no longer have an excuse.

Check out the project here: www.firenation.tech

Tags: #VibeCoding #Antigravity #Firebase #IndieHackers #WebDevelopment #FIRE