Is user experience about design?

Yes it is part of design.. Usually there is a designated UX team who are experts in usability, and this team provide mock-ups and UI work-flows (with consistent UI elements) as part of product design...

Yeah Offcourse, UX is an important part of the design.

Actually UX means, How an application provides easy to use and pleasing experience to its user. Besides an app having good look and feel, It should also have easy to use and pleasing experience to its user.

It seems that the intent of the question in not clear to all. Your question relates to the user-experience of those who operate software or use a website or an application and whether this has to with (product) design.

Yes, modern professional design always takes the user-experience into account. It's become a buzz saying in the world of design (software, apps, websites or products) that if the design does not make the user-experience better, then it is a failed design. User-experience is combination of psychological factors related to how user tend to use certain products, which influence the future design of such products.

This has been demonstrated by the famous transformation of Apple products' design into one that uses less cluttery user-interface (UI) and less buttons for more features and better user experience (UX). That's what made them exceptionally beautiful in the first place. 

In some case design can influence user-experience too. For example: if Facebook (as the most used website in existence) decides to change its design or location or he [home] and [notification] buttons, you will soon find new websites adapt to this structure, because the "user-experience" has been influenced by the web design of an authoritative & highly popular website like Facebook. Users may feel strange to have to look for [home] and [notification] on the left side, if they have been used to it being on the right-side.

experince ia usually needed at any filed

The question is not clear.

SURE

 YES ( UX)  IT,S  VERY IMPORTANT PART OF DESIGN

Thanks for directing question towards me 

The answers of members  are very clear and they covered the subject

I think your question should be like this:

Does design work need an experienced employee to do it?

If this what you mean, by sure yes it does.

If you mean something else, please explain.

I think that everything needs a designer was and Design

Experience has to do with doing or at least attempting to do ....  It could be in any field, activity, task, business, career or what so ever !