All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
It is permissible to make the clothes that a woman may wear at home and outside in front of Mahram men and non-Mahram men and to participate in your work in the company that you mentioned in the question. You are not sinful if women wear these clothes in an improper way in a manner that they do not cover their ‘Awrah, because these clothes are not especially made for this purpose and it is not possible for you to know women who will use them in a permissible way and those who will use them in an impermissible way. Therefore, it is not correct to say that it is forbidden to work in this company or in the factory where these goods are produced.
As regards working in (making) extravagant wedding dresses, there is nothing which prohibits that for this reason (extravagance).
Allaah Knows best.