Optimizing Slack API Usage in a Rails App with Caching
🚨 The Problem I was working on a Rails app that integrated with Slack for two main features: Mapping Slack users to our HR app Sending notifications to Slack users or channels Everything worked fine locally, but in staging and production, Slack rate-limit errors (429 Too Many Requests) started appearing: 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 imposes strict rate limits per API method. ...