Pattern presented in the talk for handling third-party webhooks: instead of synchronously processing the payload all the way to the database, the API endpoint stores the payload as a 'technical event' in the event store and publishes it to a queue; an async event handler later processes it. Benefits: complete external-system audit log, fast responses (no DB work on the hot path), independently scalable web server vs. async workers, ability to replay payloads without relying on the provider's retry mechanism, and easier debugging/troubleshooting. Main drawback: events may be processed out of order, requiring invariants (e.g. timestamp checks in an aggregate) to avoid overwriting newer data with older.