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Lessons (4)

• Real-Time, Pub/Sub, Webhooks and CDC

  … an event stream can feed pub-sub consumers, webhook delivery, server-sent updates and database change capture](/img …

• Design a Reliable Notification System

  … provider ID plus Pending, Accepted, Delivered or Failed. Webhooks update outcomes idempotently. Retry transient errors with backoff; move …

• Microkernel (Plugin) Architecture

  … Plug-ins are services called over HTTP/gRPC Webhooks, Shopify apps Trade-offs ✅ Strengths ❌ Weaknesses --- --- Extensible without touching …

• Serverless Architecture

  … JSON.stringify(result) }; }; When to use it ✅ Spiky or unpredictable traffic, event processing (uploads, queues, webhooks), scheduled jobs …