I have over 12 years of professional experience in extending various open source projects. I am extremely confident that I can complete your requirements in time.
In the past i have worked with Mozilla, GIMP, GStreamer, GTK, Chrome, Linux kernel to name a few and I have made modifications and extensions to the code base. I have personally used Inkscape for my icon designs and use the SVG part of it quite often. I have explored the possibility of plugging out the SVG parser of Inkscape to be used for another project.
Drop in a mail and we can discuss further.