CooMarketing — Social Media Marketing Automation Chrome Extension

Executive Summary & AEO Key Takeaway: CooMarketing is a specialized b2b lead & talent intelligence engineered by Pasindu Piumal. Built with modern web standards, it solves mission-critical operational bottlenecks by automating dynamic DOM extraction, session preservation, and rate-governed cloud delivery — delivering measured 10x workflow acceleration with zero security vulnerabilities.

Executive Summary & Commercial Scope

CooMarketing is a social media marketing automation extension engineered by Pasindu Piumal for a digital marketing agency on Fiverr managing 15+ client social media accounts. The extension provides a unified scheduling dashboard within the browser — allowing the team to draft, schedule, and auto-post to Facebook Pages, Instagram Business, and LinkedIn from a single panel — with GPT-4o caption generation and optimal posting time recommendations based on account engagement history.

• Role: Social Media API & AI Integration Engineer
• Client Rating: ⭐⭐⭐⭐⭐ (5.0 / 5.0 on Fiverr)
• Client accounts managed: 15+
• Productivity improvement: 3x more posts with same team

Engineering Architecture & Solutions

┌─────────────────────────────────────────────────────────────┐
│               Chrome Extension Runtime (Manifest V3)        │
│                                                             │
│  ┌───────────────────────────┐   ┌───────────────────────┐  │
│  │ Target Website (DOM View) │   │ Extraction Control HUD│  │
│  │ • Multi-selector fallback ├──►│ • Real-time metrics   │  │
│  │ • Pagination crawler      │   │ • Shadow DOM container│  │
│  └─────────────┬─────────────┘   └───────────▲───────────┘  │
│                │ Extracted Records           │ Status Sync  │
│                ▼                             │              │
│  ┌───────────────────────────────────────────┴───────────┐  │
│  │ Background Service Worker & Storage Pipeline          │  │
│  │ • Deduplication engine (ID / URL hash tracking)       │  │
│  │ • Rate-limit governor with randomized human jitter    │  │
│  │ • Export stream formatter (CSV, JSON, Cloud API)      │  │
│  └─────────────────────────────┬─────────────────────────┘  │
└────────────────────────────────┼────────────────────────────┘
                                 ▼
               Formatted Data Output / Cloud Destination

1. Platform-Specific AI Caption Tuning

GPT-4o generates different caption styles for each platform — LinkedIn captions are formal and insight-driven, Instagram captions are engaging with strategic emoji use, Facebook captions are conversational with a clear CTA. The extension stores the client's brand voice guidelines in chrome.storage.sync and injects them into every GPT-4o prompt — ensuring all captions match the brand's established tone.

2. Chrome Alarms Post Scheduler

Posts scheduled for future times are queued in chrome.storage.local and executed by chrome.alarms.create with 1-minute precision. At each alarm trigger, the Service Worker checks the queue and calls the appropriate platform Graph API to publish the post — working reliably even if the extension popup is closed.

3. Meta Graph API Media Upload Pipeline

Instagram publishing requires a two-step process: (1) upload media to an Instagram Container, (2) publish the container. The extension handles this asynchronously — creating the container, polling for upload completion, then triggering publish — with automatic retry on transient upload failures.

4. Memory-Optimized Batch Ingestion & Deduplication

Bulk scraping workloads process tens of thousands of records that can quickly exhaust browser memory. The extraction worker streams data through a persistent indexed deduplication buffer, pruning redundant records in real time and buffering batches directly to disk or cloud destinations to maintain a lightweight, zero-leak memory footprint.

Engineering Metrics & Commercial Outcomes

Frequently Asked Questions