Refers to a professional who designs buildings and often oversees their construction. Can be used for both licensed architects and, more broadly, for someone who creates or plans something.
彼は有名な建築家です。
He is a famous architect.
You need a national license to become an architect.
He studied architecture in college and became an architect.
She works as an architect at a design firm in Tokyo.
We commissioned a famous architect to design our new house.