I'm kind of new in this of freelancing , but i have more than 10 years in software development, mostly in IOS , but also i worked in some projects in Android and Windows phone Most of my work was in UI/UX , from using the basic components of cocoa and applying all sort of style/layout customizations , to custom components made with CoreGraphics I also worked in proyects were performance was quite a big deal , so i'm used to write by default the most efficient code that i can handle As far as backend knowledge , i can work with SOAP/REST services, XML/JSON parsing I have a technical degree in Engineering , and i'm currently studying to be a psychologist (kind of addicted to new knowledge je )