job security = J = joe code

jock n.

1. A programmer who is characterized by large and somewhat brute-force programs. See brute force. 2. When modified by another noun, describes a specialist in some particular computing area. The compounds `compiler jock' and `systems jock' seem to be the best-established examples.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.