Hey !
Here are the top 10 engineering colleges ranked according to the placements (based on previous years statistics):
1) IIT Hyderabad - Indian Institute of Technology (IITH)
2) NIT Warangal (NITW) - National Institute of Technology
3) IIIT Hyderabad - International Institute of Information Technology
4) JNTU Hyderabad - Jawaharlal Nehru Technological University
5) BITS - Birla Institute of Technology and Sciences, Hyderabad
6) University College of Engineering (Osmania Engineering University)
7) MEC - Mahindra Ecole Centrale
8) Chaitanya Bharathi Institute of Technology - [CBIT]
9)Gokaraju Rangaraju Institute of Engineering and Technology [GRIET]
10) G Narayanamma Institute of Technology and Science - [GNITS]

Check the link for more information regarding top colleges in Telangana.
https://engineering.careers360.com/colleges/ranking/top-engineering-colleges-in-telangana
Hope this helps
All the best !