Add leaderboard to ios app

Dear sir I am a game programmer and designer. Especially I like unity3d,cocos2d, cocos2d-x. My Design skill is very good too I have developed 150 ios and android games & apps and I know only PERFECT & TRUE & NO PROBLEM. If you are an high skilled client you can know that I am a top game developer. - Unity3D ( Main skill ) - Autodesk Maya,Photoshop,Illustrator,Google sketchup,Zbrush,Cinema4D- Game Character Design, Environment Design, UI/UX Design - Unity Shading(Simlab editor,Shading programming), Autodesk Maya HyperShader - 3D Modeling, UV Mapping, Rigging, Animation,Motion Capture,Mecanime, - C#,java,objective-c,c++ - Unity2D game (NGUI,2D Toolkit,PlayMaker,Unity 2D Sprite) - Networking(SmartFox server,Photon Cloud) - Unity Skin Design - Prime31 - Game Center, In-App Purchase, Multiplayer Game - PushWoosh, Push Notifications - iAd, Adwirl, Admob, In Mobi, Chartboost, TapJoy, Next Peer, Inner Active - Flurry, Testflight - iPhone/iPod/iPad, Android, Phonegap - Facebook, Twitter My objective is to provide my clients with quality professional service when creating their mobile games. Always can satisfy any client who works with me! All of your issues will be resolved by me. Good service,Long term relation partnership are my RULE and also my GOAL. Please enjoy hiring me , Please expect fine service and great result at anytime. Thank very much and Regards! Zhang XiaoJie