Käyttäjän YouSheng profiilikuva
Maan China lippu Shenyang, China
Jäsen alkaen 4. toukokuuta 2017
3 suositusta


Online-tilassa Offline-tilassa
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)
dollaria50 dollaria / tunti
27 arvostelua
  • 100%Suoritetut työtehtävät
  • 100%Budjetin mukaisesti
  • 100%Ajallaan
  • 22%Uudelleenpalkkaamisaste


Viimeaikaiset arvostelut

  • käyttäjän mikewill949 kuva Project for Jin Y. -- 2 $400.00 USD

    “Great job! I have worked with him several times in the past and every time he is trustworthy and able to complete project very quickly. Hands down the best coder I have ever worked with! A+ work every time!”

  • käyttäjän alanluong66 kuva A GPS IOS App $800.00 USD

    “My first time on freelancer and I’m so glad that I’ve chosen Jin as developer. Not only finish on time and deliver high quality, he also gave me suggestion to approve my project for better user experience. Jin understood what I wanted for my project quickly without me providing much detail. I will definitely have him again for my next project. Strongly recommend to other employers. Thank you for the great work Jin.”

  • käyttäjän mikewill949 kuva Project for Jin Y. $600.00 USD

    “Jin was amazing! I was struggling with this app we were trying to develop and within minutes he understood the issues we were having and was able to jump in and fix them. I will for sure use him again and hopefully one day I can hire him full time just for me! Great job and thank you for the help!”

  • käyttäjän SkynetItalia kuva Project for Jin Y. $500.00 USD

    “Excellent communication, good guy indeed.”

  • käyttäjän anemone kuva smart phone app for iOS and Android [Sealed]

    “Really good expertise with iOS and Swift. Very few coders understand all aspects of iOS. Demonstrated his knowledge and skills with this app with limited guidance”

  • käyttäjän Jayden L. kuva Build a native iOS App $400.00 USD

    “Jin is great to work with. Has excellent English and responds to questions in a timely manner. His iOS skills have produced exactly what I was after, and next time I will hire him for both iOS and Android development. Highly recommend this developer.”


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


  • Facebook yhdistetty
  • Suositeltu freelancer
  • Maksu varmennettu
  • Puhelinnumero varmennettu
  • Henkilöllisyys varmennettu
  • Sähköposti varmennettu

Vahvimmat taitoni

Selaa samanlaisia freelancereita