I implement or fix Stripe billing flows for SaaS products, marketplaces, and web apps.

This includes checkout, subscriptions, billing portal, webhook handling, failed payment states, subscription status syncing, and backend-confirmed access control.

The goal is simple: your users should pay smoothly, your backend should know the correct payment state, and your product access should not depend on fragile frontend assumptions.

Stripe Checkout or subscription setup

Billing portal integration

Webhook handling

Subscription status syncing

Failed/cancelled payment handling

Backend access-control logic

Database payment state updates

Testing checklist for billing flows