Pattern
Ingest · Inspect · Replay · Forward
Webhook Relay & Inspector
Webhook ingestion + live inspector: receive signed webhooks, browse payloads in real time over WebSocket, replay captured events, and forward matches to configured endpoints with bounded retries.
Python 3.11FastAPIWebSocketsHMAC verificationReact + VitePostgreSQL (scale-up)Docker Compose
Reliability
HMAC + bounded retries
Project Overview
FastAPI ingress with HMAC verification, in-memory event store, three-pane inspector UI (events / detail / forwarding rules), live WebSocket status panel, replay endpoint, and rule editor. Built to prove backend depth beyond CRUD.
Challenge
Debugging webhook integrations across providers (Stripe, Meta, etc.) typically requires ngrok scrolling and manual replay — slow and lossy.
Solution
Built a small operational tool: signed ingress endpoint per source, real-time inspector UI over WebSockets, replay endpoint, and rule-driven forwarding with retries.
Results
Portable backend service that demonstrates event-driven design, idempotency thinking, and operational debugging — directly transferable to multi-tenant SaaS work.