Full-Stack Developer Needed to Take AI-Built Marketplace to Production

Project Overview I am building HandyLinked, a two-sided home-services marketplace that connects homeowners/customers with local service professionals. The current application has been built using v0 and I am looking for an experienced full-stack developer to review the existing codebase, database architecture, and functionality, then take the application to a production-ready MVP. The goal is NOT to rebuild the application from scratch. I want a developer who can understand the existing code, identify what is missing or needs improvement, and finish the platform properly. What I Need First, I want a complete technical audit of the current v0 codebase. You will evaluate: Frontend architecture Backend architecture Database structure Authentication User permissions/roles API integrations Security Performance Mobile responsiveness Error handling Scalability Deployment configuration Existing bugs and incomplete functionality Then provide a clear roadmap and fixed-price estimate for completing the MVP. Core Marketplace Features HandyLinked will have two primary user types: Customers Create an account Create/manage profile Search for contractors Browse contractor profiles Search by service and location Post a job Upload photos/details Receive quotes Compare contractors Communicate with contractors Hire a contractor Track job status Make payments Leave reviews View job/payment history Contractors Create professional profile Select service categories Define service area Upload portfolio/photos Receive job opportunities Submit quotes Communicate with customers Manage jobs Update job status Receive payments Build reviews/reputation Manage profile and availability Admin Manage users Manage contractors Manage customers Manage jobs Manage categories Monitor transactions Manage disputes Review reported users/content Manage platform settings View marketplace activity Database The database needs to be properly structured and scalable. Potential entities include: Users Customer Profiles Contractor Profiles Service Categories Services Jobs Job Photos Quotes Messages Reviews Payments Transactions Disputes Notifications I am open to your recommendations regarding the database architecture and technology. Payments The platform will eventually support protected payments / marketplace payments, where customers pay through the platform and funds are handled according to the job/payment workflow. Experience with Stripe Connect or similar marketplace payment systems is highly preferred. Technical Experience Required Please have strong experience with: React Next.js TypeScript PostgreSQL Supabase or similar backend/database platforms REST APIs Authentication/authorization Stripe/Stripe Connect Marketplace applications Responsive web applications Git/GitHub Production deployment Experience taking applications generated by v0 or other AI development tools into production is a major plus. Important I do NOT want someone to simply rebuild the application. I want someone who can: Understand the existing codebase Audit what has already been built Identify problems Explain what needs to be changed Preserve what is already working Complete missing functionality Secure the application Connect the production database/backend Test the entire application Deploy it properly Project Structure I would prefer to work through milestones. Milestone 1 — Technical Audit Review the existing application and provide: What works What doesn't work What needs to be rebuilt Database recommendations Security concerns Deployment requirements Estimated completion cost Milestone 2 — Backend & Database Production database Authentication User roles/permissions APIs Data relationships Security rules File storage Milestone 3 — Marketplace Functionality Job posting Contractor search Quotes Messaging Job management Reviews Notifications Milestone 4 — Payments Stripe integration Marketplace payment functionality Transaction records Payment status Refund/dispute workflows Milestone 5 — Testing & Deployment Full QA testing Security review Mobile testing Performance testing Bug fixes Production deployment Domain configuration Environment variables Backups Documentation What I Am Looking For I am looking for a senior full-stack developer, not someone who only specializes in frontend design. You should be comfortable making architectural decisions and explaining them clearly. Experience with marketplaces such as: Thumbtack Angi TaskRabbit Fiverr Upwork Home-services platforms is a strong plus. How to Apply Please include: Your hourly rate Your estimated cost to complete a project like this 2–3 examples of marketplace or SaaS applications you have built Your experience with React/Next.js/PostgreSQL/Supabase Your experience with Stripe Connect or marketplace payments Your experience taking AI-generated code into production Your estimated timeline Whether you are comfortable working through milestones What you would want to inspect first in the existing codebase Important Application Requirement Start your proposal with: "HANDYLINKED" Then briefly explain how you would approach auditing an existing v0-built marketplace before making changes. Generic proposals will not be considered. Budget I am looking for a reasonable, experienced developer and prefer a fixed-price milestone structure. The initial technical audit will be paid separately. Please provide a realistic estimate based on the existing code rather than quoting a large number without reviewing the application.