I´m also in software engineering. I carry my decent sized folder and a multitool (Gerber Multiplier or Leatherman Wave) on my belt. The pouches are clearly visible. I´m expected to be creative, careful and think beyond immediate problems. Having items which show that I do this even off duty is not really out of line.
This attitude seems to be slightly contagious. One of my coworkers found the courage to carry his Leatherman on the belt too.