Diploma

If you are interested to study more in this field then you can go for higher studies. You have the option to purse M.Tech after B.Tech. Master of Technology (M.Tech) is the advancement in this field through which you are particularly specialized in one area. Some candidates also choose MBA after B.Tech. One can also opt teaching field and become professor after M.Tech.
Candidates can also pursue higher studies along with job. They can pursue courses in distance mode as many Universities in India offers distance education. It will not adds value to your academic qualification but also helps you to secure good position in an organization.
After M.Tech, one can also enter in research field by pursuing Doctor of Philosophy (Ph.D) in related discipline.
If you have the capability to open your company then you can go for it and became an entrepreneur. Nowadays, many talented graduates in engineering are working on their own startup.
If talking about job then, career scope is really good in this field. Depending upon your skills and knowledge, you will get the job.
In India, there are many private companies that recruits a large number of engineers every year. Jobs availability is not only in private sectors but public sector organizations also recruits engineers.