A porter or an attendant who is on duty at night in a hotel, infirmary, etc.(noun)
The Century Dictionary (Public Domain)
Use "night-porter" in a sentence
"There was only the night-porter in the hall of the hotel."
"Half-believing, half-doubting the words of the fortune-teller, this early morning following hard upon her arrival in Heliopolis she slipped from her room, wakened the astounded night-porter of the Desert Palace"
"Later, when her beloved child wakened the night-porter, Jane Coop, blue with anxiety and cold, most unhygienically closed the window and thankfully padded off to her comfortable bed."