Modernize Simple .NET Website

I'm seeking a skilled web designer and developer to modify my simple .NET application website built with HTML, CSS, JavaScript, and Bootstrap. NO conding only HTML side work.

Key Requirements:
- Update the overall look and feel
- Improve mobile responsiveness
- Enhance user experience (UX)
- Make SEO friendly

Ideal Skills & Experience:
- Strong background in web design and development
- Proficiency in HTML, CSS, JavaScript
- Experience with Bootstrap
- Proven track record in improving UX and mobile responsiveness

Please share your portfolio and relevant experience. Looking forward to your bids!