Creating an online designer of creative projects

It is necessary to develop a prototype editor (designer) of “creative projects” with a possible development and support of a full-fledged project. A constructor that allows the user to assemble a product from predefined elements in the library, controlling their location, orientation and overlay. You can imagine as a very simple version of Visio, "sharpened" for a specific type of products and the average user. Also in the prototype you need the ability to save and load such a product, combine several of them into one. Possibility to replenish the library of elements.
We need a front end specialist. The development of the site will be a separate project. The online builder will be built into the site.