You said the Hebrews did not look for a redeemer; I used the Hebrew text to show that they did.
Study Jewish theology and you will find that they do not believe man needs to be redeemed/saved. The particular verse in Job in your English translation of the Hebrew OT is an abbreviated one -- leaving out some crucial details to wit (a) the Holy One was about to help Job for his (b) present sufferings.
Your version says something completely different: it changes the Holy One to a "redeemer" and also implies that Job's sufferings will be removed in the "latter day" (other versions hint at the distant future even the end of times).
This difference clearly shows how various man-chosen variations of the Bible lead one to read and "believe" different things. The Septuagint was written two hundred years before Christ for Alexandrian Jews, translated from the Hebrew original by 72 rabbis. The Gospels quote from the Septuagint in over 95% of the cases. I place my confidence in them. You place your confidence in a text that was redacted by rabbinical Judaism that rejected Christianity.