Service at the door

I'm looking for an experienced developer to create a web app for an e-commerce platform. The app should be responsive and optimized for both iOS and Android devices.

Key requirements:
- User-friendly interface
- Secure payment gateway integration
- Product search and filter functionality
- User account management
- Admin dashboard for order and inventory management

Ideal skills and experience:
- Proven experience in developing web apps, particularly for e-commerce
- Strong knowledge of security protocols and payment integrations
- Familiarity with responsive design principles
- Experience with backend technologies and databases

Please provide samples of previous work and a brief project plan.