I will fix broken stripe integration webhooks subscriptions billing bugs

Your Stripe integration was working, now webhooks are failing silently, subscriptions are out of sync, or payments are getting stuck. I fix broken Stripe integrations built with .NET, Node.js, or NestJS: webhook signature failures, subscription state that doesn't match your database, failed-payment retries that never fire, and checkout flows that break in production but worked in testing.

Common issues I fix:

• Webhook events failing signature verification or arriving out of order
• Subscription status not syncing after upgrades, downgrades, or cancellations
• Failed payments not triggering retry logic or dunning emails
• Double-charging from missing idempotency keys
• Checkout session or payment intent errors that only show up live

I'll diagnose the root cause, fix it, and document what broke and why.

What I need from you: error logs or webhook event IDs, relevant API docs or sandbox access, and a description of what's failing.