M.Tech

Integrated M.Tech in Software Engineering awarded by UGC recognised university is vid for jobs both Government & Private and higher education in India & abroad. Placements will depend on Ranking of University or colleges and its earlier placement records.

Salary depends on the employer/the organisation you joined. But after pursuing Bachelor's and Master's you will get a good pay. It also depends in the colleges from which you complete your Masters and lastly, your own skills.

Yes, SRM do have dual degree program. B.Tech+MS, B.Tech+M.Tech, M.Tech+MBA.
All the best.

Advantage B.Tech-M.Tech dual degree is that you will be able to save one year but big disadvantage is that you will get struck with an Institute. If you do not select right Institute you do not have any corrections option available with you. If you do B.Tech from Tier 3, engineering college you can

B.Tech and M.Tech are engineering degrees where as maths and statistics fall under science stream. No engineering college in India offer integrated B.Tech-M.Tech maths or science. However, you may evaluate option of doing integrated M.Sc in institutes such as IITs and BITS Pilani.