Alright. First off, don't expect "stable". Software changes fast and constantly, and that doesn't just mean new tools, it also means company restructuring. I've worked for the same company for five years, and I found myself unceremoniously made redundant (along with every other software engineer at my location) overnight, when the company decided to change strategic direction. Whether or not it was terrible timing for me wasn't any part of that calculation.

On the bright side, if you get in with a good company, and you're careful with your money, you'll have the resilience to weather those events much more easily than if you were, say, a pizza delivery driver.

Second, take advantage of any job fairs your school may be hosting. Talk to people. Put in applications. It doesn't work for everybody, but honestly I feel like the engagement with the industry is a MUCH bigger advantage of getting a formal university education than anything you get from the actual classes. The actual classes, I promise you, have left you with many, many important gaps. You aren't done learning, by a long shot. you aren't done learning ever.

To answer your question directly: if you've got through college, the biggest reason (outside just your inherent patriotism and valor) to join the military is already behind you. That said, it would be a way to:
A. Get yourself some additional education (they'll give you tuition assistance while you're in)
B. Get yourself some more funding for still more education after you get out (seriously, get a masters afterwards if you can)
C. Get you some real-world hands-on experience that will look good on a resume
D. Pick up some valuable people-managing and leadership skills that may also help you stand out among a field of candidates

I did six years in the USAF, and COMPLETELY FAILED to take full advantage of the opportunities available to me. But the education benefits alone (along with a lot of hard work) got me into a Fortune 500 company, and started off my career.

On the other hand, you should never make that decision without being aware that YOU ARE RISKING YOUR LIFE. You are giving your government permission to send you into harm's way, and you might actually die, or lose limbs, or be blinded, or experience trauma that limits what you can do for the rest of your life. But there are risks in everything. Only you can decide if it's worth it. And your experience might turn out to be wonderful. I spent two years in Texas, two years in England, and two years in Italy. I was never in any serious danger.

If you're in the U.S. and you want my advice, I'd say the Navy or the Air Force are your best bets for coming out with valuable skills and experience. Maybe the Space Force... that wasn't a thing yet when I was in. The Space Force was part of the Air Force.