Optimizing Slack API Usage in a Rails App with Caching
🚨 The Problem I was working on a Rails app that used Slack for two main things: Mapping Slack users to our HR app Sending notifications to Slack users or channels Everything looked fine locally, but in staging and production Slack rate-limit errors (429 Too Many Requests) started showing up: Mapping users required fetching the Slack user list repeatedly Sending notifications in bulk triggered multiple API requests in a short time Some requests failed, causing unreliable notifications and mapping 🔍 Root Cause Slack has strict rate limits for each API method. ...