Some very godly men might disagree in a few points of this traditional view. Martin Luther certainly did on the book of James. But if someone has more than a few disagreements and they might not be firmly grounded in the faith. Perhaps they might not be believers at all.
As a complete book, Job is the oldest written book in the Bible. It could be the oldest book in the world. It was written around the time of the Patriarchs, Abraham to Joseph. That makes it an Ice Age book. The speeches were likely written before they were delivered. Then these speeches were compiled into a book later. Perhaps others wrote the speeches down as they spoke, but cuneiform writing using wedges into clay tablets would require several people transcribing at the same time. However it was done, someone recorded their speeches and the speeches of God. God also directly revealed the scenes in heaven.
While it certainly is possible that the events in the book of Job took place before the flood, and the book was preserved by Noah and his family, there is no evidence to support this theory. Almost no Jewish sources support this. Job had 7 sons and 3 daughters before the events recorded began. He had 7 more sons and 3 more daughters and lived another 140 years after the events recorded in the book of Job. It is reasonable, based on how long he lived, to believe that Job was older than Abraham.
The book includes hundreds of descriptions of everyday life, and the details could fit with any preindustrial society anywhere on earth. Civilization has not developed or progressed the way Secular Humanists teach. The major technological changes in the past 200 years have not improved the quality of family life. The creatures God describes to Job, generally translated as leviathan and behemoth, fit what we know about dinosaurs. Dinosaurs could be what we know as dragons.
How did the Jews include Job in their sacred writings? The book of Job was written before the Jews were a nation. None of possible answers can be verified. But everyone agrees that Moses had the book of Job and included it with the writings he left the Children of Israel.
Image Credit: Behemoth and Leviathan by William Blake