Servi Invoice Generator (SIG)
A single-tenant invoicing web app for a small service business: create an invoice fast, preview it, generate a PDF, and email it on-site.
Problem → Solution
Problem: Small service teams often create invoices late or manually, and customers wait too long for a PDF copy.
Solution: SIG lets technicians generate an invoice in minutes, preview it, and email a PDF immediately—while keeping everything stored and searchable.
Key Features
- Role-based login (Admin / Technician) with no public registration
- Create invoice from existing client + service, or enter new data on the fly
- Automatic totals: subtotal, tax, discount, total
- PDF generation and email sending
- Invoice history with status + re-send capability
- Admin panel for user management and service catalog
How It Works
- User logs in → authorized routes based on role.
- Invoice form collects client + line items → validates input.
- Server calculates totals and persists invoice + line items.
- Preview page renders the invoice and generates a PDF.
- Email service sends PDF attachment to the client.
Screenshots
What I Learned
- How to structure role-based authorization cleanly in MVC.
- Handling real deployment concerns: database connectivity, configuration, and resilience.
Next Improvements
- Invoice payment workflow (paid date, partial payments).
- Better reporting/export.