After completing B.Sc in computer science, you can do Master in Computer application or Master's in Computer Science. After getting a master's degree, you can get jobs in IT sectors as software developer, programmer, system analyst, software consultant, web developer/ designer etc. Reputed companies like TCS, Wipro, Infosys, Accenture, Cognizant etc. recruit MCA students.
You can also go for MBA if you have interest in Management Studies. It is better to pursue MBA from any reputed university. There are many job offers in this field.