Stock Trading Web App Upgrade

I have a live, fully functional stock-trading web app that now needs a top-to-bottom refresh. The scope is threefold: 1) User interface The dashboard layout, interactive charts and graphs, and overall navigation must become cleaner, faster and more intuitive, without losing our current branding... (Budget: ₹600 - ₹1500 INR, Jobs: API Development, Backend Development, Frontend Development, JavaScript, Node.js, Performance Tuning, React.js, Web Development)