C# Print Engine Developer

I'm looking for an expert C# developer that has worked on WYSIWYG print engines previously. I currently have it implemented in C# using GDI+ and the Win32 RTF API for text rendering. It is basically a wysiwyg designer that you use to print different templates that you have full control over editing. It's backend file format is XML based. I'm looking to immediately improve: 1) performance/optimization to increase responsiveness and reduce memory footprint 2) ensure that all elements (photos, lines, textboxes) match between the print-out designer 3) Improve the zooming functionality in the designer so that items don't become pixelated (textboxes, specifically) 4) possibly replace RTF rendering with a third party RTF control that allows sharper rendering in the UI. Please only bid if you have experience working with high-quality print projects in C#. Ability to demonstate some of your past work is a must.