Stripe Integration Service

Stripe is the easiest payment processor to integrate and the easiest to misintegrate. The "happy path" — accept a card, charge it once — takes thirty minutes. The full integration — webhooks, refunds, disputes, subscription proration, multi-currency, SCA, recovery from failed payments, tax — is multi-week work that most teams skip until they hit the first real edge case.

Idempotency is the most-skipped piece. Every Stripe write call should include an Idempotency-Key. Without it, a network blip on your end leads to duplicate charges, duplicate subscriptions, or duplicate refunds. We have seen production codebases where the idempotency key was hardcoded to a single string, defeating its purpose entirely.

Webhooks are the part everyone gets wrong. Signing verification often skipped (security hole). Order of arrival not assumed correctly (your code assumes `invoice.paid` arrives before `subscription.updated` — sometimes it does not). Retries handled poorly (the same event is processed twice and your customer is double-credited). Webhook event log not retained (impossible to replay or audit).

Subscription billing has gotchas: proration calculations, trial-end behaviour, payment-failure dunning, customer-portal configuration, upgrade/downgrade logic, multi-seat pricing. Each is a real product decision that affects the customer experience and your revenue. Treating it as "Stripe handles it" leaves money and customers on the table.

AsyncForge has senior engineers who have shipped Stripe integrations to production many times. Submit Stripe Checkout setup, subscription billing, Connect onboarding, dispute handling, or a full payment stack. Light 4 days, Standard 48 hours, Pro 1 day.