We have a PC GUI that needs to work on Mac as well. Its a VPN PC Gui that should have the look and feel for MAC and not look too much like PC. Programmer has to both code and test it on various mac platforms. Our application uses Qt (which is multi-platform) for UI, so a big part of the source code will be work on mac too, but connection mechanism (OpenVPN and IPSec in future) must be created separately for mac and some other issues (separate server etc.) Developer should know how to create an OpenVPN and IPSec connection under Mac OS from application. List of requirements: 1. QT Framework and C++ for cross-platform developments 2. Ability to port existing windows code base on QT on MacOS and Linux (both OSes have same Unix architecture, so you can kill two birds with one stone) 3. Basic knowledge of networking including OpenVPN and IPSEC vpn software. 4. Experience in GIT, SVN or any other VCS. Desired Skills: Linux Mac OS X C++ Qt VPN Keywords: Software Application