Claude Code Full-Stack Developer to Integrate Finished HTML Portals Into Existing Live App

I have an existing live Next.js/Node/PostgreSQL/Stripe application with working authentication, database records, RFQs, quotes, orders, payments and routing. I also have three completed interactive HTML prototypes: 1. Public website 2. Customer portal 3. Admin portal This is NOT a from-scratch build and it is not a design project. The designs, layouts and workflows are already completed. I need one capable full-stack developer to use Claude Code, Codex, Cursor or similar AI tools to integrate these prototypes into the existing application while preserving all current functionality and production data. Complete scope: • Install the new public, customer and admin designs • Connect every screen to real application data • Preserve authentication, existing customers, RFQs, quotes, orders and payments • Implement Messages, Documents, Partners, Supplier Blaster, Supplier Directory, Response Inbox and Audit Log • Implement returns and Stripe refunds • Enforce Owner, Operations and Customer permissions on the server—not only by hiding interface elements • Connect customer messages and documents with the corresponding admin records • Remove all mock data, prototype notices, demo language and browser-only functionality • Make all forms, searches, filters, uploads, buttons and workflows functional • Maintain responsive layouts at desktop, tablet and mobile sizes • Test critical RFQ, quote, payment, refund, messaging and permission workflows • Deploy a preview, correct issues, launch to production and provide 14 days of implementation bug fixes Development requirements: • Work inside the existing repository—do not scaffold a replacement application • Use feature branches, pull requests and preview deployments • Never push directly to the production branch • Never commit secrets or production credentials • Do not access the production database until the approved launch step • The person applying must personally perform the work—no unapproved substitution • AI-generated code must be reviewed and tested before submission This is one complete contract with milestone payments, not a partial reskin followed by a second project. Fixed budget: $850 Expected timeline: 2 weeks To apply, begin your proposal with “CODE RED” and answer: 1. Show one live full-stack application you personally built using Next.js or React with a real database and authentication. 2. Describe your experience with Stripe, role-based permissions and file uploads. 3. Explain how you use Claude Code, Codex or Cursor while checking its work. 4. Confirm that you personally will perform the work and can complete the stated scope within the fixed budget.