Jonathan Concepcion is a California based web ui developer with over 10 years of development experience. From working on an enterprise level company such as E*Trade, Guitar Center and Oracle website which actively receives over 2 million unique visitors a day.

Jon’s duties include development of new modules and pages, active maintenance, and code refactoring. Able to multitask and worked multiple projects simultaneously. Ability to improvise code, takes ownership, and learns new skills on the job. Jon’s loves to code using HTML5, SASS, jQuery, AngularJS, Cordova, WordPress and NodeJS. Please visit my online portfolio.



HTML, CSS3, Stylus, LESS, SASS, jQuery, AngularJS, Raw JS, Accessibility, PHP and MySql


NodeJS, Bower, Grunt, PHP, WordPress, Ghost, Alfresco CMS


PSD to Full Functional Website, Responsive Web Design, Web Mobile Development,
Cordova/Phonegap Development, Single Page App, Progressive Code Enhancements, SEO Friendly, Standards Compliant, Cross-browser Compatibility


VI, VIM, Sublime Text 3, GIT and SVN, iTrack, Jira, Basecamp, Adobe Photoshop and Illustrator, Terminal, Putty, Chrome Developer Tools and Firebug


E*Trade Financial

Web UI Developer – Aug 2011 – Present

E*Trade Financial Corporation is a U.S.-based financial services company headquartered in New York. It is a holding company, the major business of which is an online discount stock brokerage service for self-directed investors.

  • Front End Development utilizing HTML5, XSL, CSS3, and JavaScript leveraging the Bootstrap framework and a Java, SQL backend
  • Developed templates with XSLT 2.0, HTML5 as per the design document
  • Collaborated with back end programmers to help create controllers and get the XML data feed and JSON Created Global Styles and JavaScript Utility files
  • Cross-browser to work seamlessly to IE8+ and other major web browsers
  • Main role is maintained and develop a global CSS, JS and HTML structure across the site, templates to be reuse as standard code for every project.

Guitar Center

Web UI Developer Jul 2010 – Aug 2011

Guitar Center is the largest chain of musical instrument retailers in the world with 262 locations throughout the United States. Its headquarters is in Westlake Village, California.

  • Converting PSD format and to code. Technology used includes HTML5, CSS3, jQuery, PHP, Drupal, WordPress and ColdFusion.
  • Creating an in-house javascript global functions such as overlay, popovers, tooltip and ajax slider.
  • Front-end development using standards based HTML5 and CSS3 working with jQuery/jQuery mobile in conjunction with a proprietary .NET driven CMS
  • Spearheaded adoption of new principles such as responsive design, mobile first, and adaptive design

Oracle (Philippines)

Web Developer – Jun 2008 – Dec 2010

Oracle Philippines has a fast growing list of more than 600 companies across industries. Oracle Philippines, as in the U.S., is slowly being recognized as the leader in e-business with its e-business solutions cutting across key economic sectors including telecommunications, banking and finance, government, manufacturing, retail and distribution and consumer products.

  • Website front-end developer, focusing on user registration, e-mail blast, and website template per events, maintaining and updating the files and database using PHPList and MySql.
  • Creating templates using XHTML, CSS and jQuery
  • Analyzing monthly report of analytics
  • Updating and maintaining PHPList core files Developing multi online registration list.

HardwareZone (Philippines)

Web Developer – Jan 2005 – Feb 2008

HWM Philippines is the flagship publication of HardwareZone Philippines, a media company focusing on technology. This page will serve as the melting pot for updates on HWM

  • Creating monthly XHTML and CSS for magazine featured contents
  • Developing monthly email html
  • Developing internal website using PHP, MySql, CSS, HTML and Javascript
  • Creating email templates for marketing department



Informatics International College

Bachelor of Science – Computer Programming and Multimedia Internet


Tagalog and English