noun
A person who delivers packages, mail, or goods. Neutral, everyday term.
配達人が荷物を玄関まで運んでくれた。
The delivery person brought the package to the front door.
郵便配達人 specifically refers to a mail carrier (postal delivery person), while 配達人 can refer to any delivery person (parcels, food, etc.).
Compound of 配達 (delivery) + 人 (person). The reading はいたつにん is a straightforward combination of the on'yomi of 配 (hai), 達 (tatsu), and 人 (nin).