AutoFill Engine

One-click job application autofill. Upload your resume once, fill any form instantly.

A Chrome/Edge browser extension that parses your resume with Gemini AI and auto-fills job application forms on any portal — Lever, Greenhouse, Workday, Ashby, and more.

Features

• AI-powered resume parsing — Gemini 2.5 Flash extracts structured data from PDF/DOCX
• One-click form fill — fills name, email, phone, location, LinkedIn, GitHub, and more
• Framework-agnostic — bypasses React, Vue, and Angular controlled inputs using native setters
• Smart label detection — 8 strategies including aria-label, data-automation-id, and parent walk
• Fuzzy dropdown matching — selects the right option even when labels don't match exactly
• Multi-step form support — MutationObserver auto-fills dynamically loaded sections
• Offline-first — profile stored locally in the browser, no server needed after parsing
• Visual feedback — toast notification confirms how many fields were filled

Quick Start

# Backend
cd backend && npm install && npm run dev

# Extension
# Chrome → chrome://extensions → Developer mode → Load unpacked → select extension/

Tech Stack

Layer	Technology
Extension	Chrome Manifest V3, Vanilla JS
Backend	Node.js, Express
AI	Gemini 2.5 Flash
Database	MongoDB Atlas (optional)
Hosting	Vercel (serverless)

Architecture

├── backend/
│   ├── server.js                  Express app (Vercel-compatible)
│   ├── routes/resumeRoutes.js     POST /api/resume/parse, GET /api/profile/:userId
│   ├── services/geminiService.js  Gemini structured extraction
│   ├── utils/documentParser.js    PDF/DOCX → plain text
│   └── models/UserProfile.js     Mongoose schema
│
└── extension/
    ├── manifest.json              Manifest V3
    ├── popup/                     Upload UI + profile display
    ├── content/content.js         Autofill injection engine
    ├── background/service-worker.js  Badge + storage management
    └── styles/content.css         In-page toast styles

How It Works

1. Upload — Extension sends resume to POST /api/resume/parse
2. Extract — Backend pulls text via pdf-parse / mammoth
3. Parse — Gemini returns structured JSON (personal, education, experience, skills, links)
4. Store — Profile saved to chrome.storage.local + optional MongoDB sync
5. Fill — Content script matches form fields by label and sets values with native setters
6. Observe — MutationObserver re-fills when new form sections appear

Browser Support

Browser	Desktop	Mobile
Chrome	✅	—
Edge	✅	—
Brave	✅	—
Opera	✅	—
Kiwi Browser	—	✅ Android
Firefox	❌	❌
Safari	❌	❌

Environment Variables

Variable	Required	Description
GEMINI_API_KEY	Yes	Google AI API key
MONGODB_URI	No	MongoDB Atlas connection string
PORT	No	Server port (default: 8080)

API Endpoints

Method	Path	Description
GET	/health	Health check
POST	/api/resume/parse	Upload + parse resume (multipart/form-data)
GET	/api/profile/:userId	Retrieve stored profile