ASP to ASPX Conversion for Web App

I'm looking for an experienced developer to convert my internal business web application from ASP to ASPX. The app currently has user authentication and data reporting features.

Key Features:
- User Authentication
- Data Reporting

During the conversion, I also need the application to be mobile responsive.

Ideal Skills:
- Extensive experience with ASP and ASPX
- Proven track record of converting web applications
- Strong skills in implementing mobile responsiveness
- Experience with internal business applications
- Italian language