No IIT's or NIT's offers the course of BTech Software Engineering. If you aspire to be a software engineer then you need to take admission in the course of BTech Computer Science and Engineering which is offered by all the IIT's and NIT's. The admission to the IIT's are provided on the basis of JEE Advanced score. To be eligible for the JEE Advanced you need to score above the cutoff score of JEE MAINS.

Now the IIT's also offers the course of MTech/ME , for that you need to qualify the examination of GATE in the paper code CS.

So this are the process for seeking admission to the IIT's. The NIT's provides admission on the basis of JEE MAINS score for UG and GATE score for PG courses.

To know more about JEE Mains visit the link below:

https://engineering.careers360.com/articles/jee-main-2022

To know more about JEE Advanced visit the link below:

https://engineering.careers360.com/exams/jee-advanced

For IIT MTech admission visit the link below:

https://engineering.careers360.com/articles/iit-mtech-admissions

To know more about CSE as a career, visit the link below:

https://www.careers360.com/courses/computer-science-engineering-course

I hope this answer helps. All the very best for your future endeavors!