I'm one of just few developers how started Mac OS X development before iOS arrived. I handle all layers from UI, system integration, security, data (CoreData, SQLite...) communication protocols (HTTP, XML, JSON). I'm mastering all debugging and profiling methods. Have deployed Mac OS X device driver for USB modems too... Mac OS X does not have many secrets for me.
Objective-C experience 10yrs+
As I have done a lot of iOS/mobile programming, I can analyze and transfer what is possible - and propose what should be done differently on Mac. I'm a team player with an ambition to propose and fulfill.