I am looking for a full-stack developer to replicate the entire product and functionality of Firstbase.io. This is a 1:1 pixel-perfect replication that requires a fully functional backend to handle the business registration and user management processes. Core Features & Functionality to Analyze: Onboarding & Business Setup Quiz: A multi-step questionnaire that uses complex logic to collect user data and recommend specific incorporation paths. Dynamic Pricing & Cost Calculator: A real-time engine that calculates total costs based on state selection, entity type (LLC/C-Corp), and various service add-ons. User Authentication & Dashboard: A secure portal where users can create accounts, log in, track their formation status in real-time, and manage their legal documents. Backend Logic: A robust system to process and store user data, manage workflows, and handle the state-specific logic found on the reference site. Payment Integration: A functional checkout system to process service fees and state filing costs. Complete Site Architecture: Full replication of the frontend including all informational pages, resources, and the exact linking structure. Technical Requirements: Full Source Code: I require the complete codebase (both frontend and backend) and all associated assets upon completion. Pixel-Perfect UI: The frontend must be a 1:1 visual match to Firstbase.io with full responsiveness across all breakpoints. Scalability: The backend should be built using a modern, reliable stack (e.g., Node.js, Python, or similar) that can handle user growth. Please review Firstbase.io thoroughly and provide your quote and estimated delivery timeline based on this full-stack scope.