Profile image of sunnysmile911
Flag of China Shenyang, China
Member since September, 2014
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Top Level Developer with highest quality and fast communication on Mobile(iPhone, Android, Balckberry and Windows phone) Web and PC Application Area. I am professional software engineer with over 8 years rich experience in various fields of software development, especially all Mobile project, Image and Video Processing engines, Online Game engines, Desktop Projects and Websites for big commercial companies since 2005. I studied software at Beijing University of Technology for 4 years. I graduated from university in 2007 and I got Software Engineer Diploma. When I studied at university I made several Desktop applications and after graduated university, since 2007, I‘ve been creating high quality and excellent mobile applications and Web sites for the last 6 years. While making mobile applications and web sites for over 6 years I have got various high mobile development techniques, rich experience and in depth understanding of mobile field. For the last 6 years I’ve created large of apps for big companies an individual customers in mainly US, UK, Canada, Australia, Denmark, China and Japan. And no matter anywhere you are in the world, and no problem for communication because my English is native and I am always using phone, Skype and Email for communications with all my employers. My skills and experiences are following: -Social networking, SDK -Cocos2D -Photo processing, filtering and effect, Custom Camera using AVFoundation and OpenGL. -Video/Audio Streaming and Processing, Pattern recognition. -OpenGL ES, OpenCV, Animation, Core image, Core Graphics, Core Data, GPUImageFramework -Web services, HTTP, JSON, XML, RSS, SOAP, PHP, HTML, HTML5, Joomla, Wordpress, Codeigniter -GPS & Google Map -SQLite and MySQL database -FaceBook, Twitter, Youtube, Tumbir, Fickr, Instagram, Google plus -Push and local notification, Calenda, Alarm -iAd, Adwirl, Admob, Chartboost, TapJoy, Cerebro, RevMob -Flurry, Testflight, Girhub, SVN Also I promise following things with client : - Highest Quality. - Fast Development speed and keep deadline. - Best Communication everyday.
$40 美元/小时
  • 99%已完成工作
  • 89%预算内
  • 89%准时
  • 19%重复雇用率



  • image of underlay Help with Apache Configuration - Application Needs Apache, gunicorn and django front-end setup $37.98 USD

    “Awesome person to work with and a top notch developer. Really knows his stuff. Excellent communication skills. [12 October, 2017] Awesome person to work with and a top notch developer. Really knows his stuff. Excellent communication skills.”

  • image of shootingstar92 Project for Xingjun H. $40.00 USD

    “Xingjun worked hard and fast to finish on time. Very good freelancer ! I look forward to hire him again”

  • image of ayytee9000 Edit a python Script £44.00 GBP

    “great developer. will use again”

  • image of shootingstar92 Write 2 MySQL queries $20.00 USD

    “It was very nice working with Xingjun. He delivered everything as promised and he respect the deadline. I look forward to work with him again.”

  • image of dancookws Upgrade website from PHP version 5.4 and 5.5 £222.00 GBP

    “Song successfully debugged our PHP application to find the problem, upgraded our PHP version, fixed our API calls to work with TLS 1.2 and upgraded all our mysql calls to mysqli library. Song speaks English very well so it was easy for me to explain things using natural language. He also comes up with suggestions and alternative solutions and presents the options clearly. Will hire again.”

  • image of keithbrink Customize Scrapy Script $425.66 CAD

    “Great work, will hire again.”



Jan 2013 - Dec 2013 (11 months)

I made several mobile apps in this company


Software Engineer

2008 - 2012 (4 years)


  • US English Level 1
  • Preferred Freelancer Program SLA


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