I built an AI resume builder in 30 days with $0 budget here's the full stack

The problem I wanted to solve Every job seeker knows the struggle. You spend hours perfecting your resume, send it to 50 companies, and hear nothing back. The reason? Most resumes never even reach a human. They get rejected by ATS (Applicant Tracking Systems) because they don't match the job description keywords. I wanted to fix that. What I built FastTrackCV — an AI resume builder that tailors your resume to any job description in 30 seconds. Here's how it works: Fill in your resume details Paste any job description from Naukri, LinkedIn, or anywhere AI rewrites your resume to match it Get an ATS score out of 100 Download a professional PDF Live at: https://fasttrackcv.vercel.app The tech stack (all free) Frontend: React + Vite Database + Auth: Supabase (free tier) AI: OpenRouter GPT-4o-mini PDF generation: react-pdf Hosting: Vercel (free tier) Payments: Dodo Payments (pending approval) Total cost to build and host: $0 How I built it in 30 days Week 1 — Foundation Set up React + Vite,