Numerous schools offer online master's degree programs that you can complete part-time. If you live near a good graduate school, going in person may be more rewarding, but otherwise, a part-time online program is perhaps the best way to work it into your existing schedule.

I've had some good experience with the online education program at the University of Illinois, but where to look depends on your area of study.

Thanks!

I got my Master's degree while working, but only a day job (and it was a business degree, not a C.S. one).

Are you sure you can fit the time requirements into your schedule?

Hey, thanks for the comment. If I can find a good college, I am planning to stop working on the startup and do my Masters.

Where did you get the Business Degree from?

A local university where I live (Universidad ORT Uruguay).

It did take quite a lot of time and the coursework was hard, that's why I thought it's not compatible with 2 jobs.

The online degrees tjr recommends sound like a decent idea, but I got a lot of value (and some new friends :) ) out of interacting with my classmates and teachers, plus it does expand your network considerably.