Shopify Food Store Development

I'm looking for a skilled Shopify developer to create a website for selling packaged food goods.

Requirements include:
- User-friendly design
- Secure payment integration
- Mobile responsiveness
- SEO optimization
- Detailed project proposals

Ideal Skills & Experience:
- Proven Shopify development experience
- Strong design skills
- Knowledge of SEO and e-commerce best practices
- Experience with payment gateways

Please provide detailed project proposals, including timelines and cost estimates.