Yes you can get seat in IIIT Hyderabad on the basis of Jee mains marks. It offers only two 4 - year b.tech courses CSE and ECE and four 5- year integrated courses(b.tech+ms) CSD( b.yech in CSE+ms in CSE),ECD(b tech in ECE + ms in ECE ),BSD( b.tech in civil+ ms in building science and engineering)and CND(b.tevh in CSE + ms in computational natural sciences)

For admission in b.tech courses you need to cross 260-270 for CSE and 220-230 for ECE.

https://engineering.careers360.com/articles/iiit-hyderabad-btech-cutoff

All the best