I need an experienced Chrome-extension developer to create a minimum-viable product that embeds directly into Etsy’s listing editor and uses an AI back-end (OpenAI, Claude or similar) to improve everything a seller writes. Inside the Etsy interface the user should be able to click an “Optimise” button and instantly receive rewritten titles and descriptions, refreshed keyword/tag suggestions and data-driven price guidance. All processing can run through a cloud function you set up; the extension simply calls the endpoint and presents the results without refreshing the seller’s page. Because this will launch as a freemium product, the code has to include: • A subscription gate that unlocks premium suggestions once the daily free quota is reached (Stripe, Lemon Squeezy or Paddle are all fine—pick the one you’re fastest with). • Plan management and metering handled server-side so quota limits cannot be bypassed. • Chrome Web Store-ready packaging (Manifest V3, review-friendly permissions, icons, screenshots). Clean architecture matters to me. Use TypeScript, React (or Svelte) and keep everything linted, documented and containerised for simple hand-off. The back-end can be Node/Express or Cloud Functions; just make sure it scales. Acceptance criteria 1. One-click optimisation works for titles, descriptions, tags and price. 2. Freemium limits trigger correctly and premium upgrades unlock instantly. 3. Extension installs from the Chrome Web Store with no warnings and runs smoothly on the latest Chrome for Windows and macOS. 4. Codebase passes an end-to-end test suite I can run with one command. Let me know your preferred AI provider, payment stack and any questions about Etsy’s DOM quirks, and include a link to at least one production Chrome extension you’ve shipped.