I auto-applied to 247 LinkedIn jobs while watching Netflix. Here's the stack.

I spent 3 weekends building a Chrome extension that does the boring part of job hunting for me. It reads the job post, drafts a personalized email to the recruiter, optionally posts a smart comment, and attaches my resume — all from the LinkedIn job page itself.

In one evening it queued 247 applications. I got 14 interviews back over two weeks.

Here's what's under the hood:

• Chrome MV3 extension, vanilla JS content script
• Backend: PHP 8 + PostgreSQL on a $6 VPS
• LLM: GPT-4o-mini for drafts, GPT-4o for the personalization pass
• Auth: Google OAuth (no password stored)
• Pricing: free tier, no signup-wall before first use

What I learned:

1. Personalization beats volume. Generic blasts get 0 replies. Mentioning one specific line from the job post 4×s the response rate.
2. The recruiter's name in the first line matters more than the cover letter.
3. Most job seekers are bottlenecked on writing, not on finding jobs.

Try it free → https://jobapplyai.in?ref=devto
Source thread for questions, I'll reply to everything below.