Freelance Shield: Production AI Product, Built in 24 Hours

The problem: Freelancers lose money on invoices. Missed line items, wrong rates, forgotten expenses, math errors. Most don't catch it until after they've sent the invoice (or never).

What I built: Freelance Shield is an AI invoice auditor. Upload your invoice, and it scans for 23+ common errors: rate mismatches, missing line items, tax miscalculations, scope gaps, and more. It flags issues before you hit send.

Real product, real funnel. Users sign up, upload invoices, and pay through Stripe.

Google Gemini handles the invoice analysis, with prompts tuned for freelance-specific billing patterns

Python backend handles file processing, Gemini orchestration, and business logic

React frontend for the upload flow and results dashboard

PostgreSQL for user data and invoice history

Stripe for payments, fully integrated checkout

Deployed on Replit

Built in 24 hours. Not a hackathon demo. Not a prototype. A working product with auth, payments, email, and a live URL. The kind of thing most teams quote 4-6 weeks for.

Why this matters for you: This is how I work. Scope it tight, build fast, ship something real. If you need an AI product built and live in days, this is what that looks like.