From where i can do my software engineeing for best salary

Your first choice should be IIT BOMBAY, where everyone get placed with many international offers from companies like Microsoft Google JP Morgan DE Shaw, with average packages more than highest of many colleges in India. But getting into IIT BOMBAY with CSE is very hard and only top 50 students that is one in every 20000 is able to reach.
Now next choice should be IIT Delhi or Kanpur where situation is almost similar.
Even you can assume any of the old 8 IITs situation is similar for CSE everyone get placed and with many offers of more than crores. So make IIT your dreams may be next you are one among those Who end up with eight digits.