React/TypeScript SaaS Application Development – Fixed Price Proposal Required

I am seeking an experienced React developer or small development team to complete a web-based engineering SaaS application. The backend calculation engine and API already exist and are being developed separately. The primary scope is frontend development, user management, API integration, results visualisation, reporting and subscription management. Technology: React + TypeScript FastAPI backend Vercel deployment Supabase (preferred) Indicative Scope: Professional SaaS user interface User authentication and account management Save/open projects and folder management API integration with existing backend Results visualisation and graphics PDF report generation Stripe subscriptions and billing Basic admin portal I am NOT looking for hourly estimates. Please provide: Fixed-price proposal for the complete MVP. Estimated delivery timeframe. Breakdown by milestones/phases. What is included and excluded from your proposal. Examples of similar SaaS applications you have delivered. Team structure (developer, designer, QA, etc.). Ongoing support costs after launch. I am obtaining multiple proposals and will compare: Price Timeline Relevant experience Quality of previous work Technical approach Please do not submit generic proposals. Review the requirements and provide a realistic fixed-price estimate for an MVP release.