Integration Engineering Blog
Patterns, product updates, and implementation guides for SaaS integrations, event routing, retries, OAuth, and reliable delivery.
A fan-out event can succeed in one destination, fail in another, and still be in flight somewhere else. Reliable recovery starts by treating each destination as its own delivery — not by replaying the entire event.
Fan-out distributes one event to many destinations. Fan-in aggregates many signals into one downstream action. Most SaaS event pipelines need both — the mistake is solving one with the machinery of the other.