Getting into gradschool from a "real job"
We see a number of students who apply to graduate school after an undergraduate degree in math/cs followed by some years spent working at a not-any-realler-than-faculty job. In short, what admissions committees would like to know is:


what have you been doing since then, and in what way does it influence your current interests and desire for grad school
have you continued working on projects on the side ? (not a problem if not, but good if yes)


In other words, I don't view work experience as a negative in CS. In fact it's a bit of a positive because the student then usually knows what they want to do and is a lot more focused about it. There's a lot more maturity as well.