Developer-first SaaS API for EU VAT validation via VIES with Redis caching, change monitoring, and webhook notifications.
1 project · 3 articles · 2 reviews
Webhooks are HTTP callbacks that external services send when events occur — Stripe payment confirmations, GitHub push events, or form submissions. Projects here implement secure webhook receivers with signature verification.
Developer-first SaaS API for EU VAT validation via VIES with Redis caching, change monitoring, and webhook notifications.
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.
Libraries
Databases
Stripe webhook production architecture: idempotency keys in PostgreSQL and Redis, BullMQ queue, signature verification in Next.js App Router — with full
Libraries
Databases
Services
Our sales team was copying leads from the website into HubSpot by hand and things were falling through the cracks. Iurii built a proper integration that pushes every form submission straight into the CRM with the right owner and tags, and set up webhooks so status changes flow back to us automatically. He handled the edge cases I hadn't even thought about — duplicate contacts, API rate limits, retries when HubSpot is briefly down. It just works, which is exactly what I wanted.
Ingrid Solberg 🇳🇴
Operations Manager
Services
Service: api integrations
We picked vatnode for our B2B billing flow and asked Iurii to help us integrate it properly. He wired up the validation calls in our checkout, set up the webhook for VAT status changes, and walked us through the edge cases — what to do when a customer's VAT registration is suspended mid-contract, how to handle VIES outages without blocking the order. The whole integration was production-ready in a few days. Two months in, the webhook has already flagged a customer whose VAT got suspended, which would have meant invoices we couldn't legally issue. Solid work.
Mārtiņš Liepa 🇱🇻
CTO
Service: api integrations
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