Hello aspirant, cogratulations on performing well in CUSAT 2019. Based on your rank,  you can easily get a seat for CSE or IT. Following are the few colleges in which you can secure a seat in the course of your choice,

• School of Engineering, Cochin University of Science and Technology, Ernakulam
• Cochin University College of Engineering, Kuttanad

I hope this helps you with your query.

Good luck!