Hello Pradipta, your job depends upon the cut off decla red by various PSUs. There are a huge number of PSUs providing jobs on the basis of GATE score:
1. WBSEDCL
2. RITES
3. IOCL
4. DST Bihar
5. AAI
6. NALCO
7. NBCC
8. RVNL
9. MECL
10. RCFL
11. NFL
12. EIL
13. BSPHCL
14. MPPGCL
15. THDC
16. BPCL
17. NLC India Ltd.
18. SAIL
19. BHEL
20. ECIL
21. HAL
22. BEML
23. OIL India
24. BBNL
25. TATA Power
26. Cabinet secretariat, Govt. of India
27. Haryana power utilities
28. Midhani
29. DMRC
30. Coal India Ltd.
And many more organisations, you just have to visit the link given below, and apply for the companies according to their cut offs.
https://www.google.com/amp/s/engineering.careers360.com/articles/psu-recruitment-through-gate/amp
One of the perks of getting into these PSUs is that they provide a stable job with good pay. Whereas the other perks like house allowances, healthcare facilities etc. are unending in these PSUs.

Every PSU has their own eligibility criteria like pass percentage during graduation, age limit, medical fitness etc.
Also remember one thing that to get into a PSU your marks or rank is valid only till a year. So hurry! And check whether you are eligible for these jobs.
All the best!
I hope this helps.