Patterns for Building Event-driven Web & Mobile App Backends

on YouTube ↗47m

" summary

Shows concrete, deployable patterns that replace polling with async subscriptions using AppSync + EventBridge + DynamoDB Streams, API Gateway WebSockets, and IoT Core (MQTT); includes a BFF-backed demo (source on GitHub) that runs a mock order simulator, polling set to 15s, websocket connections held up to 2 hours, and serverless orchestration via Lambda and Step Functions calling Bedrock for long-running LLM work. Live demo mostly works though AV hiccups and a React reconnect bug appear during the demo.

AI-written summary · about

" chapters (11)

1. 0:00Intro
2. 4:51User interfaces
3. 7:33Bonus pattern
4. 15:52Real-time events Pattern 1
5. 22:51Real-time events Pattern 2
6. 29:13Real-time events Pattern 3
7. 33:04Real-time events Pattern 4
8. 36:29Demo
9. 39:58Long running processes
10. 43:24Push (notification) events
11. 46:55Outro

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