Production Webhook Engineering
Design resilient, secure webhook systems with confidence.
Deep technical guidance for architecture, signing, delivery, testing, and operations across SaaS and custom integration platforms — from the shape of an event payload to the worker pool that delivers it.
Core Learning Paths
Architecture Fundamentals
Delivery models, event contracts, idempotency, ordering, subscription management, and observability baselines.
Security, Signing, Validation
HMAC and JWT trust boundaries, replay defense, key rotation, mutual TLS, and endpoint hardening against SSRF.
Resilient Delivery & Retries
Queue topology, exponential backoff with jitter, dead-letter queues, circuit breakers, timeouts, and rate limiting.
Testing & Local Development
Tunnels, contract tests, mock senders and fixtures, provider sandboxes, load testing, and delivery inspection.
Start Here: Architectural Decisions
Newly Expanded Topic Areas
Subscription Management
Endpoint registration and verification, event-type filtering, and auto-disabling endpoints that keep failing.
Endpoint Hardening
SSRF defense on outbound delivery, egress IP controls, and TLS configuration on both sides of the call.
Delivery Queue Architecture
Broker selection, tenant partitioning, and sizing the worker pool that actually makes the HTTP calls.
Timeouts & Connections
Connect and read timeout budgets, connection pooling and keep-alive, and containing slow consumers.
Mocking & Sandboxes
Mock webhook senders, recorded fixtures that stay signature-valid, and provider sandbox environments.