Hello, Thanks for looking at my profile. My name is Jin Nan. I have been developing iOS/Android apps for more than 6 years, so I have lots of experiences. I developed many mobile apps till now including social networking apps, dating apps, photo sharing apps, messenger apps, shopping apps, etc. I have also already mastered new Swift language and I am a guru at Java. I have received a Sun Certified Java Developer certificate. I also have lots of experiences with backend using RoR, Parse, Firebase, Amazon Web Services. Best Regards, Jin Nan