Web-based Real Estate Calculator

I'm looking for a skilled developer to create a web-based real estate calculator primarily for home buyers. The calculator should perform mortgage calculations and property appreciation assessments. It needs to be accessible from both desktop and mobile web browsers.

Key Requirements:
- Mortgage calculation functionality
- Property appreciation analysis
- User-friendly interface for home buyers
- Responsive design for both desktop and mobile platforms

Ideal Skills and Experience:
- Experience in developing web-based calculators
- Proficiency in responsive web design
- Strong background in financial calculations
- User interface (UI) and user experience (UX) design expertise

Please provide examples of similar projects you have worked on.