I have a live, cross-platform stack that stitches together a React web app, a Flutter mobile app, Python-based AI automations, and a Solidity/Web3 crypto transaction engine. A handful of bugs have crept in across every layer and I need them squashed quickly so the entire system runs smoothly again. The current pain points are clear: • Web App – form submissions are silently failing and API responses sometimes return mismatched data. • Mobile App – the GPS tracker drifts or stalls, and on some devices the splash screen never exits its loop. • AI Automation – scheduled Python jobs (cron-triggered) are no longer firing reliably, and the data-scraping logic is returning partial, inaccurate records. • Crypto Integration – token transfers stay in a “pending” state and Web3 event listeners that should pick up confirmations never trigger. Tech stack you’ll touch: Flutter, Python 3.x, Node/React, Web3.js, Solidity smart contracts, plus Firebase Auth/Firestore and a legacy MySQL reporting DB. Acceptance once you’re done: 1. Forms on the web frontend submit every time and reflect consistent API data. 2. Mobile users see a single splash, receive accurate real-time location updates, and no unexpected foreground service crashes. 3. All cron jobs execute on schedule for a full 48-hour test window, and extracted data shows >99% field accuracy. 4. Crypto transfers reach “confirmed” within normal network times, and their events propagate back to the app layer without manual refreshes. I can provide repo access (GitHub + private Flutter branch), a staging blockchain endpoint, and sample datasets. Hit me with your turnaround estimate and a short note on similar multi-layer fixes you’ve already handled.