Can I get a good job only after M.Tech or is B.Tech good and enough?

Hi, In terms of requirement of engineers - industry requires them in two levels. In junior level, they recruit Diploma engineer and B.Tech/ BE for senior levels. As you are in the mind set of job, your B.Tech degree is strong enough to fetch you a job in equivalent level.

You can get a decent job after completing B.Tech. If want to go for teaching field, then you can pursue M.Tech.