E - commerce site development with secure user accounts and admin dashboard

I need a clean, responsive e-commerce website focused on selling my products directly to customers. The core requirement is a secure user-account system where shoppers can register, log in, manage their profiles, and view past orders.
Scope of work
- Build the full front-end and back-end for product browsing, search, and account management. 
- Integrate a reliable payment gateway so checkout is smooth and PCI-compliant.
- Set up an easy-to-use admin dashboard where I can add or edit products, track inventory, and view order history. 
- Ensure the design is mobile-friendly and optimized for fast loading. 
Provided that scalability and security are ensured, we are open to using your preferred framework such as WordPress/WooCommerce, Shopify or a custom stack based on Laravel/React.
I will supply branding assets and product data once we start.
Please include:
- Your recommended tech stack and why it’s the best fit.
- Your recommended architecture/approach
- Estimated timeline and budget
- Examples of similar e-commerce sites you’ve built with user accounts.
- Portfolio and GitHub links