Shopify Ecommerce Upgrade and Redesign

I'm seeking a professional Shopify developer or a team, who can tackle the challenges and render an improved version of my ecommerce site. You will be expected to optimize the loading speed, redesign the user interface to be more intuitive and appealing and provide additional customization options to increase overall user experience.

Here are the key points for the project:

Design and Layout:
- Implement a modern, clean layout
- Ensure the design is mobile responsive

Navigation and Search:
- Provide improved navigation and search functionality

Functionalities:
- Efficient product catalog management
- Implement effective order management and tracking

Skills and Experience:
- Solid Shopify platform experience
- Proven record in website speed optimization
- Strong GUI design capabilities
- Proficient in mobile-friendly design practices
- Experience in integrating secure payment gateways and managing product catalogs
- Strong experience in developing order management and tracking systems

I am looking for a dedicated team devoted to quality and efficiency. Looking forward to your proposals!