Armitage codebusting is an activity often conducted by runners to earn credits. It involves writing or more typically editing and rewriting code for the Armitage Software company which often employs Runners for their technical skills.
Runners often consult for Armitage to replenish their funds, although the work is not considered enjoyable by most runners. The card text gives a typical description: Drudge work, but it pays the bills.
According to the artist, the character in the card art was inspired by Penny from Inspector Gadget.