noun
Refers to a person who designs things professionally, especially in fashion, graphics, or industrial design.
彼女は有名なファッションデザイナーです。
She is a famous fashion designer.
グラフィックデザイナーとして働いています。
I work as a graphic designer.
デザイン is the noun 'design' or the act of designing, while デザイナー refers specifically to the person who designs.
Borrowed from English 'designer'.