Application - Fix and Implement New Features

We are located in NJ and I am looking for someone who can help with a medium business project. It is an application that utilizes Visual Basic, HTML and VB.net We have the core of this application completed. This application was created by a programmer in Russia and we would like to bring it in house. We have a programmer in house but he would need assistance fixing bugs and implementing new features along with tidying up the application and would provide assistance in usage with the application.