APPLICATION GENERATOR

A personal job-application copilot: paste a posting (or its URL) and Claude drafts a tailored cover letter plus a CV rebuilt from my resume data, prioritized against that role’s ATS keywords. A second Claude pass critiques the letter against a scoring rubric and can rewrite it against its own feedback in a closed loop, and finished documents export as print-ready PDFs via a server-side headless-Chrome renderer.

Next.jsClaude APISupabasePuppeteer

Solo project · Full-stack & AI · 2026

04 / 05

Project Architecture

Application Generator — system architecture diagram

Technologies used

Next.js
React
TypeScript
Tailwind CSS
Claude API
Supabase
Postgres
Puppeteer

Team

Olli Karejoki

A closed loop: generate, critique, rewrite

The first Claude pass never gets the final word. A second prompt scores the draft against an explicit rubric — tone, specificity, ATS alignment — and when it falls short, a third pass rewrites the letter against that exact feedback before handing control back to me. Nothing is scraped or generated client-side: URL fetching, prompting, scoring, and PDF rendering (via a headless-Chrome route) all run server-only, so API keys never reach the browser.

Final cover letter output declining to fabricate surgical qualifications and offering to generate a letter for a real software role instead

Role analysis flagging a HUS gastroenterological-surgery posting as a complete mismatch with the applicant's background, with a red-flag warning

Critique scorecard rating specificity, evidence, AI patterns and opening strength all 1/10, noting the draft never reached a passing score

— Get in touch

Lets build something.

koodikommando@gmail.com→

GitHub