Greetings,
Experienced UI designer, analyst and developer.
All code (before delivering) is optimised and tested for all major (or device default) browsers, sizes of client devices (be it videwall, desktop/laptop, smartphones/tablets, mobile/cell) and input types (keyboard/mouse, multitouch, infrared...)
Full integration with existing website/database will be included (or upgrade according to your specifications).
For further details/specs/ideas and brainstorm i am available trough freelancer.com message system.
Regards.