I have a fully functional, custom-built e-commerce site (HTML, PHP, JS) featuring Google authentication and JSON-based data storage for products, categories, and orders. I'm seeking a developer to enhance it step by step with the following improvements: - Add enhanced search functionality. - Implement a product reviews section. - Design a web-based admin dashboard for easier management. - Introduce upselling or related product recommendations. - Optionally, transition data storage from JSON to a database for scalability. You should be experienced with custom code (not WordPress), fluent in HTML/PHP/JS, and open to long-term collaboration starting with these manageable tasks. Please share examples of similar projects or your strategy for approaching this. Looking forward to growing the project together!