Hello Sheshathri,Greetings from Careers360.com!

To become a software engineer, 

1.First choose a degree n computer science or related field and go for it.

2.Learn programming and study data structures and algorithms.

3.Try building your own softwares

4.Try doing a lot of internships and seek job opportunities.

Finally the software industry is changing its requirements. So keep yourself updated.

Hope this helped.All the best!