A somewhat formal or occupational term for a person who sews professionally; in everyday speech, 仕立て屋 or 裁縫師 are more common.
She is a skilled seamstress.
縫工として長年働いてきた。
I have worked as a tailor for many years.
sartorius muscle
A Sino-Japanese compound of 縫 “sewing” and 工 “artisan; worker,” denoting a person professionally engaged in sewing.