Invoice Bot Automation Case Study
Serverless Billing Reconciliation Worker & Sales Tax Bot
Client Challenge
The client was processing over 12,000 credit card payments per month through Stripe. Bookkeeping teams spent more than 40 hours per month manually creating QuickBooks invoices, reconciling processing fees, and chasing down failed payments. Human input errors led to mismatched balances and tax compliance risks.
Project Scope
An automated financial ledger agent that links payment processors with cloud accounting software. It processes transaction webhooks, calculates regional sales taxes, generates invoices, and logs discrepancies.
Custom Solution Workflow
Stripe Webhook Parsing
Processes Stripe transaction payloads (charge.succeeded, invoice.payment_succeeded, invoice.payment_failed).
Customer Database Matching
Checks QuickBooks for matches using email hashes, dynamically generating new customer objects if missing.
TaxJar/QuickBooks Tax Query
Queries localized tax APIs to calculate and apply correct sales tax and VAT rates based on checkout addresses.
Ledger Record Generation
Creates tax-compliant invoices in QuickBooks, applies payments, and logs Stripe processing fees as expenses.
SLA Alerts for Failures
Routes failed payments and invoice discrepancies to the finance Slack channel with diagnostic links.
Technology Stack
Provides transaction payloads and customer billing meta-details.
Serves as the corporate financial system of record for invoices and taxes.
Runs serverless node handlers scaling instantly with transaction traffic.
Stores secure ID mapping references between Stripe and QuickBooks customers.
Alerts the collections and accounting team of payment failures in real time.
"Reconciliation went from a monthly headache to a non-event. The Invoice Bot handles 12,000+ payments perfectly, saving us days of manual auditing."
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