Job had replied to those who had been reproaching him, "How long will you torment me?" He recounted a list of people who had failed him, forgotten him, despised him. Attacks. Laments.
Then this. Job speaks confidently that he will be rescued and that he will be in God's presence. Many commentators and other readers assume that Job is talking about God when he says redeemer. For example, hear an excerpt from Handel's oratorio, Messiah:
I know that my redeemer liveth