OK, the iron age started around 1000 bc, how did anyone know about or understand iron before the flood (per answers in Genesis, circa 2300 bc). This could not have been written before the flood, iron was unknown and the bronze age was starting concurrent with the flood at 2300 bc.
Therefore, this description had to date to no earlier than 1000 bc and could not be a contemporary account of the creature.
Good night.
9th generation from Adam worked bronze and iron.
Genesis 4:22 And Zillah, she also bare Tubalcain, an instructer of every artificer in brass and iron: and the sister of Tubalcain was Naamah.
Why are you assuming that Job existed before the flood?