Some of the top Engineering colleges for Btech in CSE are:

• Indian Institute of Technology Delhi
• Delhi Technological University, Delhi
• Netaji Subhas Institute of Technology, Delhi
• University School of Information Communication and Technology, Delhi
• National Institute of Technology Delhi 
• Maharaja Surajmal Institute of Technology, Delhi

Most of the colleges mentioned above are government based and take through JEE Mains.

Let me know incase you have any other query for the same.

Good Luck.