Engineering collages with 70% in 12 CBSE board
And you can also check many other colleges which take admission in based upon jee mains rank or on 12%
You should take comedk exam for engineering in karnataka get a 4 digit rank and choose CS or IAS in the applicable engineering college.
And if you score more than 70% in engineering you will easily find a job in bangalore or around.
But be specific with the branch because studying something like mechanical and then working in IT is not justified to your four years of Engineering.
Good luck!!
I would request you to refer to the following question : https://www.careers360.com/question-i-got-70-in-12-cbse-board-and-i-scored-157-marks-in-jee-mains-what-should-i-do-for-taking-a-admission-in-btech-in-govt-college?icn=question-title-details&ici=question-detail-page
Hope your queries will be solved..