With 90% in Computer Science Engineering (Diploma), you are well qualified to get admission into B.Tech Computer Engineering through lateral entry (Direct Second Year Engineering) in good colleges in Mumbai.

Here are some well-known colleges in Mumbai where you can apply:

1. Veermata Jijabai Technological Institute (VJTI) – One of the top government colleges. Very competitive, but with your marks, you have a fair chance.

2. Sardar Patel Institute of Technology (SPIT), Andheri – Good faculty and placement.

3. Fr. Conceicao Rodrigues College of Engineering (Fr. CRCE), Bandra – Well-known private college with decent placements.

4. KJ Somaiya Institute of Technology – A reputed private college offering lateral entry.

5. Thakur College of Engineering and Technology (TCET), Kandivali – Good for placements in CSE/IT.

6. Vidyalankar Institute of Technology, Wadala – Good labs and placement for Computer Engineering.

7. Dwarkadas J. Sanghvi College of Engineering (DJ Sanghvi), Vile Parle – If eligible, it is highly preferred.

How to apply:

You will need to apply through the CAP (Centralized Admission Process) conducted by the State CET Cell, Maharashtra, for Direct Second Year Engineering (DSE). Admission is mostly based on your diploma percentage, and 90% is a strong score.