Profile image of YouSheng
Flag of China Shenyang, China
Member since May, 2017
2 Recomendações


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My Main Expertise; - Design and develop Native iOS/Android applications using Swift, Obj-C, Java - Hybrid app development using React native, Ionic - Have extensive knowledge and experiences in OOP(Object Oriented Programming) Architecture - Expert in Multi-Threading, Client/Server Programming, Database Programming, Networking - Building backend service using Php(Laravel, Codeigniter), Node.JS, Python. - Database Programming (MySQL, Sqlite, Realm, MongoDB, Dynamo, PostgreSql) - Social Media Integration, Geo-Location, GPS tracking, Payment gateway integration. - Cloud Backend service integration such as Firebase, AWS, QuickBlox ... - Image/Video processing using OpenCV, OpenGL, 3rd party plugins. - High Web development skill in HTML5, Javascript, BootStrap, Php, Angular. - Server Management (AWS EC2, Digital Ocean, Heroku) - Source Version Control(Git/Bitbucket/SVN and etc) - Task/Team Management tool (Github, Trello, Jira, Slack) - Bug tracking system(Instabug, Sentry, Bugsnag)
$50 USD/hr
18 comentários
  • 100%Trabalhos Concluídos
  • 100%No orçamento
  • 100%No Prazo
  • 29%Taxa de Recontratação


Comentários recentes

  • image of Justin T. Project for Jin Y. -- 4 $200.00 USD

    “Jin has been a great resource to us. For every expansion that we have wanted to add to our app Jin has delivered. We can always count on him to be on time and on budget, going the extra mile in every way.”

  • image of ste821 Android Apps $277.50 USD


  • image of Justin T. Project for Jin Y. -- 3 $100.00 USD

    “Jin continues to provide us with great service whenever necessary. As we grow Jin has been constantly available for our needs. I hope to continue working with him for a long time.”

  • image of Justin T. Project for Jin Y. -- 2 $100.00 USD

    “Jin has been great. He helped me developed me develop the perfect API for my mobile app. He has been patient and walked me through the process of what needed to be delivered. I plan to work with him again in the future on more projects.”

  • image of Justin T. Project for YouSheng -- 2 $100.00 USD

    “YouSheng has helped me out once again! I needed an old web app updated and converted into an iOS app and he came through. I've been very happy working with him and will continue to in the future.”

  • image of carlosulver Build a very simple iphone app using RANDOM() or Srandom() functions $70.00 USD

    “This guy is awesome... a TRUE AND PROFESSIONAL CODER. He is awesome in system analisys and perfect in coding. Ill hire him again EVERY time I need some development”


Senior Software Engineer

Sep 2010 - Jun 2014 (3 years)

SoftWare Development, Service & Consulting and Technical Support.


Bachelor of Computer Engineering

2006 - 2010 (4 years)


Graduation certificate (2010)

Liaoning University

Graduation certificate of the Liaoning University


Semantic validation of environmental observations data Environmental Modelling and Software.

In this paper, we focus on one such language, the Water Data Transfer Format (WDTF), and present an approach for validation of WDTF data contents. We show that by using Semantic Web technologies, we can express those constraints not captured by WDTF and check their consistency with respect to data through a query reduction technique that allows existing reasoners to be used for data validation.


  • iPhone Development 1
  • US English Level 1
  • Android 1
  • PHP Level 1
  • Preferred Freelancer Program SLA


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