Stefanini is looking for UI Developer - III in Philadelphia, PA (Direct Hire only)Responsibilities:Client is looking for a UI JavaScript Developer to code and maintain applications across the portfolio. The developer must have expert command of modern JavaScript application patterns, libraries such as backbone.js, marionette.js and require.js, experience using data visualization libraries such as HighCharts, HighMaps, and D3.js, and be able to deliver projects featuring well formatted HTML5 and CSS3 templates. The candidate must be able to communicate effectively with a wide range of stakeholders, develop, test and deploy projects with a high level of accuracy and personal responsibility.

Qualifications:Top 5-10 technical skills required for the job:Advanced JavaScript including command of design patterns for JavaScript application developmentExpert level HTML5, CSS3 and use of design libraries such as BootStrapAdvanced knowledge of JavaScript application libraries such as backbone.js, marionette.js and require.js Advanced knowledge of source control and build process for front end applicationsProven experience developing mobile responsive applications Knowledge of interactive JavaScript libraries such as D3.js, HighCharts, etc. Required Skills:JavaScript design patterns (AMD, etc.)Advanced jQueryJavaScript application and utility libraries (backbone.js, marionette.js, require.js, underscore.js) Advanced knowledge of source control and build process for front end applications Critical Skills:Advanced experience with Backbone.js and Marionette.js.Expert level HTML5, CSS3 Preferred Skills: JavaScript interaction libraries (D3.js, HighCharts, etc.)Design experience