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ProjectMessaging Automation2023—

WhatsApp Messaging Automation

Scalable WhatsApp automation platform built with Golang and WhatsMeow, enabling programmatic message delivery, persistent device session management, and event-driven communication for enterprise applications and business workflows.

Tech Stack

  • Go
  • Gin
  • WhatsMeow
  • REST API

Key Features

  • Programmatic message delivery: text, images, documents, captions, and file attachments
  • Persistent WhatsApp session management with QR code authentication and automatic reconnection
  • REST API integration for external systems to trigger messages via HTTP
  • Event-driven messaging — business events trigger WhatsApp notifications automatically
  • Delivery monitoring with sent/delivery status tracking and retry mechanism
  • Multi-session support for managing multiple WhatsApp device connections

Architecture

REST API → WhatsApp Service (WhatsMeow) → WhatsApp Network

  • 1.Business systems submit message requests through the REST API (Gin)
  • 2.WhatsApp Service validates request and checks active session availability
  • 3.WhatsMeow client sends message through the WhatsApp protocol network
  • 4.Session Storage persists device authentication for automatic reconnection
  • 5.Event Handler processes incoming events and delivery status updates

Data / Processing Flow

  1. 01External application submits message request to REST API
  2. 02Platform validates recipient number, payload, and session availability
  3. 03Active WhatsApp session checked and auto-restored if disconnected
  4. 04Message delivered via WhatsMeow client (text, images, documents)
  5. 05Delivery status returned and logged for monitoring

Use Cases

  • Automated notifications — account verification, password reset, login alerts
  • Report distribution — automatically deliver generated documents via WhatsApp
  • Business workflow automation — approval processes, task assignments, operational events
  • Customer engagement — personalized messages and announcements
  • Internal monitoring — notify admins on system failures or operational alerts

My Contributions

  • Designed the WhatsApp messaging architecture and service layer.
  • Developed REST APIs using Golang and Gin.
  • Integrated WhatsMeow for WhatsApp protocol communication.
  • Implemented persistent session storage and automatic reconnection on disconnect.
  • Built QR-based device authentication workflows.
  • Developed event-driven messaging service for system integrations.
  • Supported media and document delivery (images, PDFs, Office files, audio, video).

Technical Highlights

  • WhatsMeow library handles the WhatsApp multi-device protocol natively in Go
  • Persistent session storage keeps device authenticated across service restarts
  • Event-driven architecture decouples business systems from WhatsApp delivery layer
  • Supports rich media types: text, images, PDF, Office documents, audio, and video files
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https://yusufrifqi.work/projects/whatsapp-automation