FAST is the gold standard in computer and IT related degrees in Pakistan. If you get admission, go in eyes closed with full confidence.
Your biggest advantage is a strong alumni network which helps to secure interviews. Getting a job depends on your skill, in my company, people are seated at a workstation, whoever does the task fastest gets the interview. We hired 2 persons who had private B.Sc degree from Wah recently as they knew how to get the job done.
Regardless, any good university life is tough, they grill you hard so go in with full preparation and stay mentally and emotionally strong. A good network of seniors and classmates will help you survive. In short, for software engineering, FAST NUCES is an optimal choice. I have yet to meet any unemployed FASTIAN, opportunities are plenty and many big names hire directly from campus.
Right now, dont worry about job, worry about being a good student. If you have secured admission, go for it eyes closed.
Good luck!