My production site runs on the full MERN stack and it needs some urgent love. A few interactive components on the React front-end have stopped responding, and several API calls are returning empty or malformed payloads. I’m looking for someone who can dive in right away, trace those interactive glitches and the underlying data-retrieval errors, then leave the codebase faster and cleaner than you found it. Here’s what I need done: • React fixes so every button, modal, and dynamic widget behaves consistently on desktop and mobile • Node.js + Express debugging to locate the MongoDB queries causing the data-retrieval failures • Performance tuning, refactoring, and linting so the app stays maintainable and quick • End-to-end testing followed by a smooth deployment to our cloud host This is a fixed-price job in the 1–2 K range and I’d like to kick off immediately. Please include links to past MERN projects or your GitHub profile that show solid debugging and optimization skills. Deliverables – Updated source code in Git (feature branch + pull request) – Staging and production deployments with all tests passing Acceptance criteria – Interactive elements respond correctly across devices – All data endpoints return accurate payloads with no errors in the logs – Noticeable improvement in Lighthouse and MongoDB performance metrics If clean, reliable code and quick turnarounds are your thing, let’s get started.