Platform-Engineering

The current webhook design holds ~100K events a day with six workers. Ten times that, with unpredictable spikes, needs a different shape — transactional outbox, event bus, serverless fan-out and delivery, and per-partner isolation.

How an event-driven webhook service delivered ~100K events a day to roughly 400 partner systems with at-least-once delivery, bounded retries, and a failure trail both sides could inspect.