.Net to PHP Web App to PHP Conversion

I'm seeking a professional to convert my small .Net web application into PHP. The project is a simple purchasing system with some unique features.

Key Requirements:
- Convert .Net Web Application to PHP
- Transfer all data from Microsoft SQL to MySQL
- Maintain all current functionalities

The existing system has the following features:
- Internal Purchasing System
- Functionality for uploading invoices with each purchase request

Ideal Skills:
- Proficiency in .Net and PHP
- Experience with database migration (Microsoft SQL to MySQL)
- Understanding of web application development
- Prior experience with purchasing systems is a plus.

Please provide your portfolio and relevant experience when bidding.