Hi Rohit,

You'll get a lot of placement opportunities in the field of Mathematics and Computation with leading Companies such as Blue Star, PayPal, Tata Advanced System,Hikari Tsushin, Qualcomm, HP, Texas Instruments, Amazon India being the top recruiters at IIT-H. Apart from placements, you'll get PHD opportunities from Universities in Japan and USA. For further information please refer to the link given below.

https://engineering.careers360.com/articles/iit-hyderabad-placement-report-2018

All the best!

Hope this will help you!