I start with your real estate business model, user journey, property workflow, and functional requirements, then design and develop the product around them. Using React.js, Next.js, Node.js, React Native, Flutter, TypeScript, PostgreSQL, MongoDB, Firebase, REST APIs, Google Maps API, and payment integrations, I build scalable real estate web applications and mobile apps with property search, advanced filters, map integration, property listings, user authentication, booking, payments, favorites, chat, push notifications, analytics, CRM, and admin panel functionality.