Fix my react node.js web app

I'm looking for a skilled Full-Stack Developer to fix and improve an existing React & Node.js web application. This is a small paid task to evaluate your skills. If you're experienced with AI integrations, vibe coding, debugging, and full-stack development, there will be opportunities for ongoing work. Please include: - A similar project you've worked on. - Your experience with React, Node.js, and AI-powered applications. - Your estimated turnaround time.