I saw a job advertisement on the Internet.

The job advertisement means "job advertisement". Want is a verb here, meaning "vt. Need; Hope; Should; If you want textile engineers, you need textile engineers, that is, you need to recruit textile engineers. In recruitment English, the sentence pattern of "be+wanted" is often used to express recruitment. Multinational corporation means "multinational corporation". A multinational company needs textile engineers. Literally, a multinational company needs textile engineers, that is, a multinational company recruits textile engineers. Apply for ... means "apply for ...", which translates as "apply for ...". Do you want to apply (that is, recruit textile engineers)? Take a closer look at the other explanations of "cestlavielsh" upstairs, which are also good and clear enough. I'm afraid you still don't understand, so I add that my translation is the same as his. I saw an advertisement on the Internet that a multinational company wanted a textile engineer.

Do you want to apply? Please accept his reply.