Iurii Uses: #Webhooks

vatnode.dev – EU VAT Validation API

Developer-first SaaS API for EU VAT validation via VIES with Redis caching, change monitoring, and webhook notifications.

How to call a logistics provider’s API from an order-processing worker, and why some booking APIs answer immediately and others don’t.

How to wire an external accounting or bookkeeping API into a payment flow, and why the call belongs in the queued worker, not the webhook handler.

Webhook security past the signature: replay attacks, payload trust, DoS, IP allow-listing, and secret rotation – what verification does not protect.

E-commerce order automation that cut 160+ hours/month of manual work to zero: Stripe webhook to VAT invoice and tracking in under 2 minutes.

Stripe webhook production architecture: idempotency keys in PostgreSQL and Redis, a BullMQ queue, and signature verification in Next.js App Router.