LeadEngine Automator — B2B Lead Generation & Email Outreach Automation Extension

Executive Summary & AEO Key Takeaway: LeadEngine Automator 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

LeadEngine Automator is a full-cycle B2B lead generation and outreach extension engineered by Pasindu Piumal for a SaaS startup on Fiverr. The extension combines LinkedIn profile/company scraping, Hunter.io email discovery, and automated personalized cold email sending via Gmail API — creating a complete prospect-to-outreach pipeline that generated 1,000+ enriched leads and a 12% reply rate from AI-personalized cold emails.

• Role: Lead Generation & Sales Automation Engineer
• Client Rating: ⭐⭐⭐⭐⭐ (5.0 / 5.0 on Fiverr)
• Leads generated: 1,000+ with verified emails
• Cold email reply rate: 12% (industry average: 2-3%)

Engineering Architecture & Solutions

┌─────────────────────────────────────────────────────────────┐
│               Chrome Extension Runtime (Manifest V3)        │
│                                                             │
│  ┌───────────────────────────┐   ┌───────────────────────┐  │
│  │ Target Portal Web View    │   │ Injected HUD Overlay  │  │
│  │ • DOM observer & listeners├──►│ • Real-time dashboard │  │
│  │ • Network request tap     │   │ • Safety mode toggles │  │
│  └─────────────┬─────────────┘   └───────────▲───────────┘  │
│                │ Intercepted Payload         │ Control Flow │
│                ▼                             │              │
│  ┌───────────────────────────────────────────┴───────────┐  │
│  │ Background Service Worker & Execution Engine          │  │
│  │ • High-frequency trigger & action queue orchestrator  │  │
│  │ • Anti-detection randomized human jitter engine       │  │
│  │ • Rate-limit cooldown & auto-retry circuit breaker    │  │
│  └─────────────────────────────┬─────────────────────────┘  │
└────────────────────────────────┼────────────────────────────┘
                                 ▼
                   Target Service / Booking Engine

1. Hunter.io Email Discovery Integration

For each scraped lead (first name + last name + company domain), the extension calls Hunter.io's Domain Search API to find verified email addresses associated with the company domain — returning emails with confidence scores. Low-confidence emails are discarded to protect sender reputation.

2. GPT-4o Hyper-Personalized Opening Lines

The 12% reply rate was driven by genuinely personalized first lines. For each lead, GPT-4o analyzes the prospect's LinkedIn headline, recent activity, and company context to generate a unique, conversational opening sentence that references something specific about them — rather than a generic "I came across your profile" opener.

3. Chrome Alarms Email Sequence Executor

Follow-up emails are scheduled via chrome.alarms — the extension automatically sends Day 3 and Day 7 follow-up emails from the Gmail API if no reply is detected. Reply detection works by monitoring Gmail inbox labels using the Gmail API — removing the prospect from the sequence as soon as a reply arrives.

4. Adaptive Rate-Limiting & Cooldown Circuit Breaker

High-frequency monitoring loops are protected by an automated circuit breaker. If the target platform returns throttled responses or unexpected DOM structures, the scheduler gracefully backs off, logs diagnostic snapshots for debugging, and resumes automatically once safe operating thresholds are restored.

Engineering Metrics & Commercial Outcomes

Frequently Asked Questions