Guys, can you suggest me the names of some good courses to do after B.Tech in Electronics and Communication Engineering???

Yes sure, here I am suggesting you the names of some good courses to do after B.Tech in Electronics and Communication Engineering:

M. Tech. Automotive Electronics (in collaboration with TIFAC-CORE industry partners)
M. Tech. Communication Engineering
M. Tech. Nanotechnology
M. Tech. Sensor System Technology
M. Tech. VLSI Design
Advanced Diploma in Real Time Operating Systems
PG Diploma course in Industrial Automation System Design
Diploma in VLSI Design
Certificate program in VLSI design engineering
Diploma in Embedded Systems Design
Online course on Embedded Systems
Telecom Protocol Development
Certificate courses in Verilog and VHDL
Signaling & VoIP Protocol Implementation
Advanced Diploma in DSP System Design
Optical Fiber Communications
Post Graduate Diploma in Wireless and Mobile Computing
Diploma in Wireless Technology
Radio-Television Systems
Communication Engineering
Control & Computing
Certifications in related technologies
CAD and CAM expertise to further strengthen your existing skill set

For job you can apply in following organizations:
Bharat Sanchar Nigam Limited
Bharat Electronics Limited
Bharat Electricals Limited
Oil and Natural Gas Corporation Ltd
Steel Authority of India Limited
Mahanagar Telephone Nigam Limited
Indian Space Research Organisation
Indian Oil Corporation