For very much large websites, it is always known to be a pretty common thing for one to have a team that is composed of specialists who are known to do separate tasks for the front, as well as for the back-end of applications with which they are working.
Typically, aesthetics and usability of websites that are going to be made, are all of what is concentrated on by the front-end workers, while it is that the back-end workers would simply take good care of the integrity of the data that is found within the system.