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Flag of Hong Kong Yue Wan Estate, Hong Kong
Member since October 22, 2017
5 Recommendations


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"Quality is much better than Quantity, One home run is much better than two doubles." ___________Steve Jobs My Chinese name is Yu Jun, and Nickname is Donnie Chan. I have experience for programming and server administration while over 15 years. - My main skill is as follows. ✔ Web programming : PHP, jQuery, Node.js, Angular.js, React.js, [login to view URL], Python ✔ Framework : CodeIgniter, Laravel, Sopify, Magento, Slim, Wordpress, Yii2 ✔ Mobile programming : iOS, Android, Swift, Objective C, iONIC, React Native ✔ Desktop programming : C/C++, C#, Java, QT, Mac OS, Linux ✔ Other programming : Blockchain, Wallet, Cryptocurrency, Asterisk PBX ✔ Server administration : AWS, Linux, Oracle, MS SQL Server, MySQL, PostgreSQL ✔ Security : Web security, SSL, SELinux, Firewall, OpenVPN, Radius ✔ Embedded programming : ARM, Firmware
$19 USD/hr
26 reviews
  • 100%Jobs Completed
  • 99%On Budget
  • 99%On Time
  • 21%Repeat Hire Rate


Recent Reviews


Mobile App developer

Feb 2011 - Mar 2017 (6 years)

I developed mobile apps with REST API and Mobile sites. Program Languages : Objective C, Java, Swift, HTML5, CSS3, ionic, AngularJS, [login to view URL] Target OS : iOS, Android

Software developer

Apr 2003 - Sep 2010 (7 years)

I developed the SNMP management system and SIP communication software with Asterisk PBX. Program languages : C/C++, Java, Perl, Python, PHP Target Platform : Windows, Linux, Mac OS


Bachelor's Degree

1998 - 2002 (4 years)


Red Hat Certified System Administrator (RHCSA) (2007)

Red Hat company

System administration, including installation and configuration of a Red Hat Enterprise Linux system


《简明 Objective C教程》

Learn Objective C with Chinese. Written in 2013 year.


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