Hello,

There are many options available for you after B.Tech CSE.

1. You can go for your college placements and try for a good job.
2. You can prepare for GATE Examination and score good and with that you can go for either M.TECH in IITs and NITs or expect a call from PSUs.
3. You can prepare for IElTS or GRE and go to abroad for M.S and try to get a dream job at APPLE, GOOGLE, IBM, FACEBOOK, MICROSOFT etc.
4. If you have a great startup idea, you can open your own startup buisness, but I suggest go and have an experience first.
5. You can prepare for CAT exam and take admission in IIM for MBA.
6. You can try for government jobs at ISRO, DRDO, LIC AAO (IT), Database Administrator jobs at Banking sectors.
7. If  you are interested in research you can do M.E/M.Tech from any good government college, give UGC NET JRF and can apply for PHD.

Hope it helps.