Lotus Notes add-in developer

Seeking an experienced Notes developer for design and build of an add-in to the Notes composition toolbar. We have developed an Outlook 2003 add-in using C # / .NET 1.1 / PIA Technology which allows users to perform extended functions while emailing. The add-in is displayed on the Outlook email composition toolbar and when user selects the options from the toolbar buttons/dropdowns, it connects to our server using Web services, and based on selections made by the user it builds up the mail body and finally sends via Outlook. We now need help in either porting it or developing something similar for Lotus Notes. Please provide detail about your experience with Notes development in your response. This is a project but if we find someone who is a solid performer we will be very interested in a permanent role.