Building a Serverless, EventSourced Slack clone

on YouTube ↗56m

" summary

Builds a Slack-like chat using Terraform to provision AWS: static front end on S3, API Gateway -> Lambda for commands, Cognito for auth, DynamoDB as the event store, projections written as JSON views back to S3, and SNS/SQS to decouple projections and plugins. Notes: DynamoDB prohibits empty strings, Kinesis holds data only 7‑day retention, and local limits force using Dynamo with two and a half writes/sec capacity in the demo. Observed latency differences 200 ms vs 800 ms (and 15 s cold start) between Node and C# Lambdas; design favours eventual consistency and simple, upgradeable architecture.

AI-written summary · about

" chapters (15)

1. 0:00Start
2. 3:55Set Up a Resource in Aws with Terraform
3. 5:53Ui
4. 8:39Policy for the S3 Bucket
5. 9:00Architecture
6. 13:47Projections
7. 21:11Event Storage
8. 28:14Setup for an Api Gateway in Aws
9. 36:38Kognito
10. 37:03Summary of How To Use It for Javascript
11. 40:01Sign Up
12. 43:24Parallel Updates to S3
13. 45:51Irc Plugin
14. 50:39Cost
15. 55:10Latency Cluster

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