Image de profil de sunnysmile911
Drapeau de China Shenyang, China
Membre depuis le 5 septembre 2014
16 Recommendations


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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, [url removed, login to view] 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 $ US / h
90 commentaires
  • 98%Travaux complétés
  • 90%Selon le budget
  • 91%Dans les temps
  • 19%Taux de Réembauche


Avis récents

  • image de Seyif A Mobile Todo list [Sealed]

    “i was satisfied”

  • image de JM1306 Project for Xingjun H. £12.00 GBP

    “Great work !”

  • image de svishaksh Project for Xingjun H. $650.00 USD

    “Great guy to work with! This is my 3rd or 4th time and he's delivered projects on time and accuracy.”

  • image de MuhammadFarag Android 4.0 + List of string entries and time based notifications [Sealed]

    “Xingjun was a pleasure to work with. He achieved the task within the time and budget, to my full satisfaction. He was very communicative and responsive throughout the project. I will definitely consider him for other projects.”

  • image de ljfarrell MYSQl project For Xingjun H only £35.00 GBP

    “Fantastic Freelancer, Happy to work with & hire again Great work.”

  • image de shoplancaster Nutrition Tracking Software (70% Completed already) $2000.00 USD

    “We had very high hopes working with Xingjun. Our project was roughly 70% completed before hiring him to finish the work. After he reviewed the current source code and APIs, he was confident he could complete the work in 30 days or less. 3 months later, many missed deadlines, he wasn't able to deliver the project as planned. I understand the lifecycle of development and that certain things can cause delays. However, an additional 60 days is not acceptable. Especially when there is very little communication. What really disappointed us was that after missing multiple deadlines, he stated he was leaving the country for almost 3 weeks without any notice. That is when decided to part ways and find another developer to finalize the project for us. I'm definitely not trying to be harsh with this review. I'm only stating the facts and that our project didn't go as planned. I'm sure he is a great developer and has many good reviews of people praising his work. So, I'm sure he does come through with other projects. Unfortunately, we didn't have a good experience.”



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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