Image de profil de YouSheng
Drapeau de China Shenyang, China
Membre depuis le 4 mai 2017
3 Recommendations


En ligne Hors ligne
? 100% SATISFACTION & BEST QUALITY ? Main Expertise; - Design and develop Native iOS/Android applications using Swift, Obj-C, Java - Hybrid app development using React native, Xamarin Native & Forms, Ionic - Expert in OOP, 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, etc - 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, Bugsnag)
$50 USD/hr
41 commentaires
  • 100%Travaux complétés
  • 99%Selon le budget
  • 98%Dans les temps
  • 18%Taux de Réembauche


Avis récents

  • image de razzagtaylor QR code apps $200.00 USD

    “good price”

  • image de Coderise Build a mobile app backend and first stage native for iOS and Android $1850.00 USD

    “Jin Y. is an excellent professional, gave very good feedback and suggestions, great communication, and I can only recommend him for anyone who wants the best freelancer out there.”

  • image de sergemerlin Android, IOS and web developer $1000.00 USD

    “Very Professional after reviewing the scope of the project advised most of the steps where not needed. Will RECOMMEND TO OTHER CLIENTS VERY HONEST. Will only work with him going forward.”

  • image de kurtnguyen Cross Platform Mobile App $1500.00 USD

    “Jin is very professional and is an expert at building mobile apps. I have worked with him before and he delivered a great product.”

  • image de kurtnguyen Cross Platform Mobile App Development - 18/06/2018 17:36 EDT $4000.00 USD

    “Without a doubt, I made the right choice in selecting Jin to help me develop my web and mobile apps. If you are looking for a trustworthy and experienced developer that will get the job done right, I highly recommend Jin. What sets him apart from other developers, outside of his great technical abilities, is that he can quickly understand your requirements and utilize his expertise to offer sound advice to improve the product. For the entire project, he provided great communication and worked fast and efficiently to complete all assigned work. I have enjoyed working with him due to his desire to please the client and focus on building positive and lasting relationships by delivering exceptional service. You will not be disappointed.”

  • image de Justin T. Project for Jin Y. -- 6 $1587.00 USD

    “Jin has been a great help to me in all of my projects. I have no need to look for any other developers thanks to his help.”


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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