Design outbound webhooks: when events occur in your platform, deliver signed HTTP POSTs to subscriber URLs with retries, exponential backoff, dead-letter after max attempts, and manual replay. Subscribers verify HMAC signatures.
DrawCode Practice Problem
Design a Webhook Delivery Service
Interactive Visualizer Workspace
Explore step-by-step interactive animations, memory state tracking, and live multi-language execution in DrawCode.
Launch Interactive Visualizer