“Did I say the angels were created after man was created?”
The job cite was an answer to this statement:
“Angels were created as His hosts and obligate servants (the biblical word used is closer to a “slave”), as God’s messangers (aggelos), not His “fans.”. They were praising God before they were ministering agents to man.
You are reading into the early Jewish biblical views (Job). Job itself represents the most ancient Judaic beliefs. The concept of angels changed drastically over the centuries in Judaism and Christianity; their origins are in Zoroastrianism. The terminology used in Job betrays its early origins. Taken overall, biblically speaking, the angles have only one function and it is always related to man.
For a decent summary (by no means exhaustive) see Angels.