I need a small-footprint, browser-based application that continuously scans every U.S. Facebook Marketplace listing and pulls the data into a single, searchable interface. I plan to build the front end around React with TypeScript, so your work will slot straight into that stack. Core features I’m after: • Robust search filters so I can zero-in on items, keywords, price ranges, zip codes, or categories on the fly. • Real-time or near-real-time alerts the moment a matching listing appears (think push notification or email webhook). • One-click export of any search result set as a clean JSON file. Behind the scenes the scraper needs to handle high volume without triggering Facebook rate limits or captchas, and the code should be organized so API keys or rotating proxies can be swapped in easily later. If you have a proven approach to headless browsing, HTML parsing, or unofficial Graph endpoints, tell me—in short, I’m looking for something resilient that can run unattended. You’ll hand back: 1. Source code (React + TypeScript front end, scraping/back-end service, and any helper scripts). 2. A short README with setup instructions and environment variables. 3. Demo credentials or video walkthrough proving the live scan, filter, alert, and JSON export all work. If you’re a U.S.-based developer with solid web-scraping chops and you’re comfortable shipping production-ready React/TypeScript code, let’s talk timelines and milestones.