AI-Powered Interview Preparation System using Local LLM for Campus Placements

Overview

An AI-powered, end-to-end interview preparation and mentoring automation system for campus placements. It enables placement cells to generate hyper-personalized 4-page interview preparation PDFs for shortlisted students, by combining job descriptions (JDs), candidate data, and LLMs via LangChain and Ollama.

Note: This template requires self-hosted n8n to run community nodes like LangChain and Ollama.

What This Workflow Does

Accepts a CSV of shortlisted students and a JD via form upload

Analyzes student profile vs JD using Ollama LLM via LangChain

Generates personalized interview preparation PDFs

Sends the PDF to each student via email

Logs all data in Google Sheets and prevents duplicate processing

Workflow Preview

📷 Please add a workflow screenshot here showing the main nodes and flow

Step-by-Step Flow

1. Form Submission

CSV of shortlisted students + JD + company name is submitted via HTTP Request form trigger.

2. Data Parsing and Google Sheet Logging

CSV parsed → structured rows added to Google Sheet named with company + batch.

3. Candidate Filtering

Only students with N8N_Agent = Not Generated are selected to avoid reprocessing.

4. AI-Powered Report Generation

LangChain agent (via Ollama + Gemini Search Tool) generates a 4-page Markdown report:

Page 1: Profile Summary, Skill Gap Analysis, Company Insights

Page 2: 15–20 Personalized Interview Questions

Page 3: 5 Group Discussion Topics + Strategy

Page 4: Custom Preparation Plan + Suggested Resources

5. PDF Creation

Markdown → Stylish PDF via APITemplate.io

6. Email Delivery

Each student receives a personalized email with the attached report.

7. Google Sheet Status Update

Marks the student’s row as “Generated” in N8N_Agent column.

Prerequisites

Self-hosted n8n with Community Nodes enabled

Local or Docker-hosted Ollama with LLaMA3.2 or equivalent model

Activated LangChain and Gemini Search Tool nodes

APITemplate.io API Key

Connected Google Sheets account

SMTP setup or Gmail node for email delivery

Customization Tips

Replace the LLM prompt in the LangChain node with your own tone/style

Modify the PDF template on APITemplate.io to reflect your institution branding

Update the email copy for formal or informal tones

Add new filters (e.g., minimum CGPA, branch) for student selection