How would you answer an interview scenario involving webhooks?

In an interview, I would first define webhooks and the problem it solves, then explain how I would sign requests, verify timestamps or replay protection, retry transient failures with backoff, use idempotent event handling, record delivery attempts, and provide observability or replay tools. I would also call out the main failure mode: treating a successful TCP connection as successful processing, or retrying without idempotency, can lose events or create duplicate business effects. Finally, I would describe how I would test, monitor, and safely roll back or recover the solution.