The Indian Space Research Organisation is the space agency of the Government of India headquartered in the city of Bengaluru. Its vision is to "harness space technology for national development", while pursuing space science research and planetary exploration

Working Scenario :

Unlike other IT engineers, you will be working in various research projects, attending governmental meetings, working with other scientists, and even implementing your cool ideas with college undergrads.

You may not be highly paid as some of your classmates working in some private company. But, we still lead a decent life.

salary is much better than what most IT companies pay.
There are other allowances like health benefits, Child's education benefits, Performance Related Incentive Scheme(PRIS), Leave and travel concession(LTC) etc.

And of course, salary is quite descent as well. And you only work for 8 hours and 5 days a week.Apart from it, Government allowances are too good as well.

Career Growth Promotion

The a system called DPC (Departmental Promotion Committee) for promotions which is an independent panel which assess your work.

Ideally your promotion is not dependent on how many higher posts are available. But, switching to a job outside ISRO may not be that easy like in private sector.