I need a complete Android-only e-commerce application built from the ground up. My goal is to give customers a smooth buying experience, so the flow—from browsing the catalog to receiving order confirmation—must feel fast, modern, and trustworthy. At a minimum, I expect: • Intuitive product catalogue with search and filter • Secure cart, checkout, and payment gateway integration • Customer login/registration with order history • Push notifications for key events (offers, shipping updates) • Lightweight admin panel for product, inventory, and order management • Clean, well-documented Kotlin or Java codebase that I can compile locally I’m flexible on schedule; quality and future-proof architecture matter more than a rushed delivery. Let me know any SDKs or third-party services you recommend and how you’ll address security, scalability, and testing. When handing over the project, please include source code, build instructions, and a short walkthrough video so I can verify everything runs as expected on my end.