Rivac LabsPayments & Billing Engineer
Payment and billing systems are unforgiving of edge cases — a missed webhook, a failed dunning retry, an unreconciled subscription change — because every one of those failures touches actual money and actual customer trust. We build Stripe, Adyen, or Braintree integrations end to end: webhook processing that's actually idempotent, dunning logic for failed payments, and subscription-billing reconciliation that catches discrepancies before finance does. This is for products adding or fixing payment infrastructure where the cost of getting it wrong is a broken customer relationship or a revenue leak. You get a payment system tested against real failure scenarios, with reconciliation you can trust.
How We’d Approach This
A clear, staged plan — not a black box
- 1
Map your billing model — one-time, subscription, usage-based — and the payment provider's specific edge cases.
- 2
Build the core payment and webhook flow, testing it against simulated failures like declined cards and retries.
- 3
Review the dunning logic and reconciliation reports with finance stakeholders before going live.
- 4
Launch the payment integration with reconciliation monitoring catching discrepancies automatically.
What You Get
Deliverables from this engagement
- Production payment integration (Stripe/Adyen/Braintree)
- Idempotent webhook processing tested against failure scenarios
- Dunning and failed-payment recovery logic
- Billing reconciliation reports for finance
Six Ways We Could Architect This
Different engagement, different build — pick the shape that fits
There’s more than one way to deliver on this service. Browse a few of the ways we’d structure the work, depending on your speed, budget, and integration needs.
Ready to get started?
Tell us what you’re trying to get done and we’ll help you find the highest-leverage place to start — scoped small enough to prove itself before you commit to anything bigger.
Talk to us about Payments & Billing Engineer