Building a serverless event driven Slack Bot

on YouTube ↗44m

" summary

Builds a serverless event-driven Slack bot for a pizzeria using AWS EventBridge, Step Functions, API Gateway, DynamoDB and a single small Lambda (only code written), and the live demo works end-to-end. Claims: EventBridge handles routing but each rule has a 5-target limit, custom buses avoid the default bus, and EventBridge + Step Functions enable loose coupling. Notes: Step Functions supports standard workflows up to one year and express for short runs, SDK integrations call thousands of APIs without extra code.

AI-written summary · about

" chapters (25)

1. 0:00Start
2. 0:53Agenda
3. 3:12Online Pizza order
4. 4:38Downstream error
5. 5:15Order canceled
6. 7:54Observable
7. 8:29Online order
8. 9:17No pineapple
9. 11:03Summary event-driven architecture
10. 11:31Amazon EventBridge
11. 12:47Event bus patterns
12. 13:45Single bus pattern
13. 14:21Decentralized (Distributed)
14. 15:27Multi bus pattern
15. 16:20Default event bus
16. 17:36Create subscriptions
17. 19:20AWS StepFunctions
18. 20:16Service integrations
19. 21:07Workflow types
20. 22:56Intrinsic functions
21. 23:48Choice
22. 24:14Pass
23. 25:47Slack webhook-In place
24. 26:43Order Service
25. 27:02Bake Service

" related talks

• 39m/Automate. Serverless and event-driven approach to DevOpsJimmy Dahlqvist · Øredev 2025
• 45mBuilding Event-driven Serverless ApplicationsGunnar Grosch · Agile India 2020
• 56mBuilding a Serverless, EventSourced Slack cloneAndy Davies · NDC Oslo 2017
• 04mSlackbot Development Serverless FrameworkPurvi Kanal · DevOps Days Toronto 2019
• 49mServerlesspresso: Building a Scalable, Event-Driven ApplicationJulian Wood · GOTO Copenhagen 2022
• 50mBuild, Deploy, Debug and Tune Serverless MicroservicesRandall Hunt · Devoxx Belgium 2017
• 30mEvolving Serverless ArchitecturesEmily Shea · GOTO EDA Day London 2024
• 38mBuilding a serverless AI powered translationserviceJimmy Dahlqvist · Øredev 2023