Hii!
Although you didn't mention your specialisation subject in b.tech, generally here are a lot of career options ahead after completion of b.tech.
* You can choose to go for higher studies.
* You can choose to join Government services and jobs by by preparing and cracking the civil services exams.
* You can study about business and MBA and start your own business.
* You can become an entrepreneur.
* You can join the Defence forces.
* You can go for courses such as automobile engineering, civil engineering, computer engineering, chemical engineering etc.,
* You can choose to go ahead with research field.
There are a lot of options.
The link given below may help you decide one-
https://www.google.com/amp/s/engineering.careers360.com/articles/what-am-i-going-do-after-btech/amp
Hope this helps.
Good luck!