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CASE STUDY · Private internship project

WhatsApp Marketing Automation

A full-stack messaging platform integrating the official WhatsApp Business API through Twilio.

Role
Full-Stack Engineer
Access
Private internship project
Campaign dashboard

CAMPAIGN

June follow-up

Scheduled
2,840Sent
2,676Delivered
1,904Read
webhook.received · message.delivered · 14:32:08
[01]

Context

A full-stack messaging platform integrating the official WhatsApp Business API through Twilio. It supports template campaigns, scheduled dispatches, background processing, and webhook-based delivery tracking.

[02]

My responsibility

Contribution role: Full-Stack Engineer. This page documents the implementation areas that can be shown publicly.

[03]

System scheme

Engineering scheme

Campaign delivery lifecycle

Input → Processing → Output

Campaign configuration, queued delivery, provider integration, and webhook feedback form one traceable messaging workflow.

  1. 01

    Template setup

    Create approved message content and campaign variables.

  2. 02

    Audience selection

    Resolve recipients and validate campaign input.

  3. 03

    Scheduling

    Persist dispatch time and campaign state.

  4. 04

    Background queue

    Process bulk sends outside the web request cycle.

  5. 05

    Twilio delivery

    Send through the official WhatsApp provider integration.

  6. 06

    Webhook feedback

    Update sent, delivered, read, and failed states.

Idempotency
Rate handling
Delivery status
Retry boundaries
[04]

Implementation breakdown

  1. 01

    Capability 01

    Drag-and-drop template builder.

  2. 02

    Capability 02

    High-throughput background job processing for bulk messaging.

  3. 03

    Capability 03

    Real-time webhook ingestion for delivery/read status updates.

[05]

Technical scope

Laravel01
React02
MySQL03
Twilio API04
Supervisor (Job Queue)05
[07]

Implementation details

  • ✓Drag-and-drop template builder.
  • ✓High-throughput background job processing for bulk messaging.
  • ✓Real-time webhook ingestion for delivery/read status updates.
[08]

Engineering focus

  • →Idempotency remained an explicit concern across the implementation.
  • →Rate handling remained an explicit concern across the implementation.
  • →Delivery status remained an explicit concern across the implementation.
  • →Retry boundaries remained an explicit concern across the implementation.

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