React & Node.js Expert Needed to Optimize Existing E-commerce Website

We are looking for an experienced Full Stack Developer to optimize our existing e-commerce platform built with React and Node.js. The ideal candidate should have experience improving application performance, optimizing APIs and database queries, fixing checkout-related issues, and ensuring a smooth user experience. Requirements: React.js Node.js / Express.js MongoDB or PostgreSQL REST APIs Performance Optimization Git Please share your relevant experience, portfolio, and estimated timeline with your proposal.