Magento Theme Customization and Responsive Design

I am looking for a Magento Frontend developer who can help me in customizing my Magento 2 website's theme and ensure it is responsive. I have a specific design in mind that I want to implement.

Key Responsibilities:
- Customize the theme of my Magento 2 website according to the specified design
- Ensure the theme is fully responsive across all devices
- Collaborate with me on design feedback and implement necessary changes

Ideal Skills and Experience:
- Proficient in Magento 2 frontend development
- Strong UI/UX design skills
- Experience in responsive design implementation
- Good communication and collaboration skills
- Ability to understand and implement design specifications

Please provide examples of Magento 2 themes you have customized, and detail your experience with responsive design.