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Intermediate ~14 hours
🔀 Full-Stack Engineer⚙️ Backend Engineer

Reliable Webhook Receiver System

Build a webhook receiver: signature verification, idempotency, retry-safe processing, dead-letter queue.

Next.js or HonoPostgreSQLStripe SDK

About this project

Webhooks are how every modern integration works. This project teaches the receiver patterns: HMAC signature verification, idempotency via event IDs, dead-letter queues for poison messages, and replay tooling. Implement against a real provider (Stripe webhooks are the gold standard). Bonus: build the admin tool to inspect and replay any event.

Why build this in 2026?

Webhook handling is the silent bug factory in every B2B SaaS. Engineers who get it right ship faster and break less.

What you'll ship

  • GitHub repo
Working Stripe webhook integration
Admin replay tool

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Skills you'll practice

rest apispostgresqlsecurity