# 🤖 AI Resume Screening Workflow (n8n + GPT-4 + Google Drive)

This project automates the process of analyzing candidate resumes against job descriptions using AI and stores the evaluation in a Google Sheet.

🚀 Features

• Automatically receives resumes via Gmail.
• Supports PDF, DOCX, and TXT files.
• Uploads resumes to Google Drive.
• Extracts text from resumes.
• Pulls a predefined Job Description (JD) from Drive.
• Uses GPT-4.1-mini via OpenRouter to:
  • Evaluate the resume against the JD.
  • Score candidate fit (0–10).
  • Extract strengths, weaknesses, risk, and reward factors.
• Extracts candidate name and email.
• Stores all results in Google Sheets with a timestamp and resume link.

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🔧 Tech Stack

• n8n – Workflow automation
• Google Drive – File storage & retrieval
• Gmail – Resume intake
• Google Sheets – Evaluation dashboard
• OpenRouter – Free GPT API
• LangChain – AI integration

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📂 Workflow Structure

1. Receive Resume

• Triggered via Gmail (poll every minute).
• Downloads resume attachment.

2. Upload & Identify File Type

• Resume is saved to Google Drive.
• File type (PDF, DOCX, TXT) is detected via Switch node.

3. Extract Resume Text

• Depending on file type:
  • PDF → Extract text
  • DOCX → Convert to Google Docs, then extract
  • TXT → Direct extract

4. Get Job Description

• Pulls a JD PDF from Drive and extracts its content.

5. Run AI Evaluation

• Sends both Resume + JD to GPT-4.1-mini.
• Uses LangChain agent with system instructions.
• Returns:
  • Candidate Strengths
  • Weaknesses
  • Risk & Reward Factors
  • Overall Fit Score (0–10)
  • Justification

6. Extract Candidate Info

• Parses resume text for:
  • First Name
  • Last Name
  • Email

7. Log to Google Sheet

• Appends:
  • Date
  • Resume Drive link
  • Name & Email
  • AI evaluation results

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🛠 Setup Guide

1. Import the Workflow into your n8n instance.
2. Connect credentials:
   • Gmail
   • Google Drive
   • Google Sheets
   • OpenRouter GPT-4.1-mini
3. Update folder IDs and file links for:
   • Resume storage
   • JD file
   • Google Sheet
4. Activate the Gmail trigger and test by sending a resume.

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📁 File Structure

My Resume Screener/
│
├── My workflow.json       # n8n full workflow
├── README.md              # Documentation