What was Rahab's occupation, according to Joshua 2:1?

Answer: A prostitute

The two spies Joshua sent to Jericho entered "the house of a prostitute named Rahab" (KJV: "an harlot's house") and stayed there.

“Then Joshua son of Nun secretly sent two spies from Shittim, saying, “Go, inspect the land, especially Jericho.” So they went and entered the house of a prostitute named Rahab and stayed there.”— Joshua 2:1 (BSB)