Serverlesspresso: Building a Scalable, Event-Driven Application
summary
A contactless coffee ordering system built on AWS proves scalable and cheap to run: a demo app uses AWS Amplify, API Gateway, Lambda, DynamoDB, Amazon EventBridge, Step Functions and AWS IoT Core to move orders from phone to barista, process workflows, and push real‑time notifications, handling ~1,000 drinks/day for about $0.53 backend cost plus SMS. Key controls include a token bucket QR gate limiting to 10 drinks every five minutes and an EventBridge + Step Functions + IoT Core pattern that removes tight coupling.
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chapters (14)
- 0:00Intro
- 1:35What is Serverlesspresso?
- 6:27What is serverless?
- 11:23Serverless means
- 12:17Serverlesspresso App
- 13:55AWS serverless services used in the app
- 17:45High level architecture
- 20:44QR validator service
- 23:36Order processor service
- 29:51Order Manager service
- 35:05Amazon EventBridge
- 38:37Handling async responses with real-time updates
- 46:44Summary
- 48:50Outro
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