SaaS
Biller / Inqonto — billing platform
Modular PHP billing: invoices, recurring charges, reminders, timesheets, VAT and PDF — structured so the product could grow without collapsing into one script.
Why it matters
Billing is revenue. Rules for VAT, reprints, access and recurrence belong in the domain, not in a PDF template.
What I delivered
- Modular PHP structure for invoice, recurring billing, reminders and timesheets
- VAT/tax calculation on the invoice path
- PDF generation for bills and print/envelope formats
- Role-based access around billing workflows
- Backend and frontend as the product required
For an organisation
I turn messy commercial rules into modules a team can extend — so the next country, reminder flow or tax change is a change, not a rewrite.