It depends on your aspirations. You can be an engineer in central government by giving exams like SSC JE etc . If you want to explore non technical services you have a lot like SSC CGL , IBPS etc. If you want to administrative service office you can opt for UPSC or State PCS. If you want to do a job in scientific firms like ISRO , BARC etc then you can give their departmental exams (for ISRO you only have exams conducted by ICRB) or you can get by GATE score. Salaries may not be high enough than private sectors(not all) but the salary is smart enough to have a decent life style.

You can work for Google with a package of Rs.1 Crore may be but the pleasure you will get being a scientist \ administrative head for your own motherland will be greater than ever. This is my perspective. It may or may not match with you.

Have a great day!