A billing engine with multi-tax logic, recurring invoices, and global payment gateway integrations — built to remove manual invoicing work, it reduced administrative workload by over 40%.
Business System · Fintech / Billing · Global · 2023
Billing across jurisdictions meant juggling different tax rules per invoice, manually re-issuing recurring charges, and reconciling payments arriving through different gateways — slow, error-prone administrative work that scaled linearly with revenue.
We built a financial engine where tax logic, recurrence, and payment collection are system behaviour rather than staff tasks: invoices compute the correct tax treatment per jurisdiction, recurring cycles issue and chase themselves, and gateway payments reconcile into one ledger view.
Web application · Billing engine · Payment gateway APIs · Automation
Billing systems earn trust through edge cases, not happy paths. The value is not the invoice template — it is correctly handling the tax treatment, the failed payment retry, and the proration nobody thought about. Encoding those rules once removes a category of recurring manual work permanently.