We have around 7+ years in Java/J2EE,PHP development. We have experience in both frontend tech stack (HTML,CSS,ExtJS, Dojo, d3.js, AngularJS,NodeJS,ExpressJS and Javascript) and J2EE tech (Struts, Spring, JSF etc), DB like (MySQL, Oracle, MSSQL server,PostgreSQL MongoDB)
We have lots of experience with REST API, JSON programming and XML programming also.
We have developed custom D3 stacked bar charts with tooltips, drill down, drill up functionality.