Hello Arshiya

There are many good courses that can be dome after BE in electronics and communication. I am listing the most trending ones below  :-

1. VLSI

2. CCNA/CCNP

3. PLC and SCADA

4. Opto-electronics

5. Nano-electronics

6. Wireless Communication

7. Power electronics

8. Embedded system

9. Optical networks

If you want to go for software sector, then CDAC, SAP.

You can also go for specialised courses like C++, Data structures.

All the best for your future !!!