Keeping On-Call Human: Serverless Slack Out-of-Hours Notifications on AWS

A serverless system that automatically handles out-of-hours customer Slack messages, reducing unnecessary on-call alerts while maintaining reliable monitoring, security, and incident visibility.

This talk was on Track 3 at 3:00pm. See the Event Agenda link below — scroll to Track 3.

This talk covers the AWS architecture — API Gateway, Lambda, SQS, DynamoDB TTL, and SNS — along with the reliability patterns that make it production-ready: signature validation, idempotency, deduplication, DLQs, retries, and CloudWatch observability.

A reusable blueprint for smarter, human-friendly alerting.