Introduction

• A high-performance job queue lib for Node.js.
• Use Redis to manage background jobs.
• To let the app to process tasks asynchronously instead of blocking the main app thread.

Client
   ↓
API Server (Producer)
   ↓
BullMQ Queue
   ↓
Redis Server
   ↓
Worker Server
- processes job in background
   ↓
Process Job

Scenarios

• Sending emails 📧
• Processing uploaded images 🖼️
• Generating reports 📊
• Calling slow APIs 🌐
• AI processing 🤖

BullMQ Job Lifecycle

waiting → active → completed
              ↓
           failed