Imagen de perfil de YouSheng
Bandera de China Shenyang, China
Miembro desde 4 de mayo de 2017
3 Recomendaciones


En línea Desconectado
✪ 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 / hora
35 comentarios
  • 100%Trabajos finalizados
  • 99%Dentro del Presupuesto
  • 98%A tiempo
  • 22%Tasa de recontratación


Comentarios recientes

  • imagen de Johannes T. Mobile development $3500.00 USD

    “The work with Jin was excellent, good communication, work delivered as expected. Will definitely hire him again for future projects”

  • imagen de dan24993 Project for Jin Y. $2100.00 USD

    “Definitely one of the best developers I've had the opportunity to work with. From the beginning to the end of the project he has been 100%. He knows the technology well, knows how to write cost fast and effective, and is great at communicating. He is an experienced, diligent and hard working programmer. He responds quickly to all requests and at all times conducts himself as a true professional. On a personal level there are few individuals that I have met in my life time that are as honest and trustworthy as Jin YouSheng. I highly recommend him to anyone who want to get the job done right, and I'll definitely hire him again!”

  • imagen de Justin T. Project for Jin Y. -- 5 $1600.00 USD

    “I have very much enjoyed my working relationship with Jin. Time after time he has impressed me with his work and speed. I will not be looking for any other developer anytime soon.”

  • imagen de Omaralawar Project for Jin Y. $200.00 USD

    “speaks good english and easy to communicate”

  • imagen de Maxxen iOS & Android App - Development €4500.00 EUR

    “It was a pleasure working with Jin. He not just delivers on time and budget, he also gave us good advices through the development process. After we changed some functions for the app he directly implemented it. The communication also went perfectly, he was always reachable and friendly. His long experience in development makes him to my number #1 choice when I have more projects to be done. Highly recommend Jin Y. to all!”

  • imagen de ABChelp Help me finish my App €376.00 EUR

    “Jin is an excellent programmer, we highly recommend Jin for his expert knowhow in Xcode! He is innovative and impulsiv, that meaning he will an answer quickly and work fast! Our work in abchelp as/corp. is to digitalise medical emergency care for very sick people, thank you Jin for saving lives with us! <3”


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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