Javascript/HTML Developer Required

We are a London based software company designing applications for the leisure industry. We are currently developing a new range of easy to use web based products.

A Javascript programmer is required for a specific task within a bookings page to enable "drag and drop" functionality. The concept is similar to many web calendar applications where a schedule is shown and elements can be dragged from one time period to another. Similarly, there are also items within each of the elements which also should allow to be dragged between scheduled elements.