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Kim Brothers
All work

A Malaysian business billing customers on prepaid and usage-based plans

Billing automation platform

Invoices, top-ups and usage limits run themselves.

  • Next.js
  • Vercel
  • Playwright QA
app / billing

Invoices this month

128

Usage vs limit

38%

  • INV-0404Generated
  • INV-0403Sent
  • INV-0402Paid
  • INV-0401Paid

Illustrative screen. No client data shown.

The challenge

Every billing cycle meant exporting usage, working out charges in a spreadsheet and typing invoices one by one.

Top-ups were confirmed by hand, so a customer could run past their limit before anyone noticed.

What we built

  • A billing engine that turns usage into invoices on schedule, with no retyping.
  • Prepaid top-ups that update balances as soon as payment lands.
  • Usage limits that warn customers and pause service by rule, not by memory.
  • An admin view of every invoice, balance and exception in one place.

How AI is used

Automated billing logic handles the routine cases, and automated QA runs the billing flows on every release, so a change never quietly breaks an invoice.

Result

Billing runs on rules instead of a monthly spreadsheet marathon. The team handles exceptions, not every invoice.

Measuring

Hours saved on billing per month

Stack

  • Next.js
  • Vercel
  • Playwright QA

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  • #2041Active
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