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Jie Cheng

Mobile Developer (iPhone/iPad/Android/Web/Cocoa/Cocos2d/Box2d/Unity3d)


Dandong, China


To the top Mobile World! I can manage your all requests for Mobile Apps and Games. I have the experience and expertise in delivering high performance mobile applications on platforms like iPhone, iPad, Android, Blackberry and Windows Phone.I usually used to make an effort to keep the high quality and exact time frame. Most of clients like this work. During these works, I was always on the same page with the clients and the “hire” was not our word, I used to go together with the clients. And we are going with long term partnership. My main skills are following: 1. Apps. ... more- iOS(iPhone & iPad), Android, Phonegap - Video, Camera, Image processing, Video/Audio Streaming, Decoding/Encoding - Backend, Web service, JSON, XML, RSS, SOAP, PHP, MYSQL - Facebook, Twitter, Youtube, Flicker, Instagram - Googe Map, GEO, MapKit - Push and local notification, Calendar, Alarm - Core graphics, Core image, OpenCV, Opengl, Animation 2. Games - Cocos2d, Box2d, Opengl, Unity3d, Corona. - GameCenter, IAP, Multiplay game - Particle effect, mask, gl view, Animation - Tap, Accelerator 3. Additional - Advertise : iAd, Adwirl, Revmob, Chartboost, Flurry, Tapjoy, - Testflight, Github, Bitbucket, SVN - Documentation, Debugging, Memory leak 4. Other skills - Reverse engineering - Windows/Linux system, desktop, utility application To provide excellent service to my client. Best regards. less

Jie Cheng has added 3 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Jul 2013

    Need iOS Programmer for Re-Usable Trivia Game
    Jie did a great job of completing the app exactly as requested. He worked through the corrections quickly. Very happy with his work and will work with him again.
    $555.56 earned
    Fixed Price

  • Jun 2013 - Jul 2013

    Fixes Needed iOS App C Objective
    Works hard to finish the project, will definitely hire him again!
    19 hours
    $33.33 / hr
    $633.27 earned

  • May 2013 - Jul 2013

    Applications game programmer and social function
    iam happy with the work so far and look forward to future projects. great work
    188 hours
    $33.33 / hr
    $6,266.04 earned

  • Jan 2013 - May 2013

    IPHONE Application
    The freelancer has made this comment private
    121 hours
    $33.33 / hr
    $4,033.28 earned

  • Jan 2013 - Apr 2013

    Simple IOS Game dev

    No feedback given

    46 hours
    $33.33 / hr
    $599.81 earned

  • Mar 2013

    Bug fixes iOS & Android
    Fixed our app. Good.
    10 hours
    $33.33 / hr
    $166.65 earned

  • View More (5)

Jie Cheng has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
English Spelling Test (U.S. Version) 5.00 1st Place! 12 mins
PHP Programming Skills Test 4.90 Top 20% 8 mins
Google Android Programming Test 4.50 Top 10% 20 mins
JavaScript 1.8 Test 4.50 Top 20% 13 mins
MySQL 5.0 Test 4.25 Top 10% 20 mins
Cocoa programming for Mac OS X 10.5 Test 4.75 Below Average 12 mins
Java Test 3.75 Top 10% 21 mins
iPhone Programming OS 4.0 Test 4.50 Above Average 19 mins
PHP5 Test 3.90 Top 30% 19 mins

Work History

1,395 hours worked
30 jobs


More than 30 hrs/week