After completing B.Tech. (Electronics & Communication Engineering) you can make your career in the measurement and control of complex industrial & electrical process. You can apply for job in following areas:

Indian Engineering Service (IES)
Indian Telephone Industries, BSNL / MTNL
Semiconductor, Chip Design-Industries (Motorola, IBM, HP, STM, Philips, IT etc)
Indian Oil Corporation Ltd. (HPCL / BPCL / IPCL)
Oil and Natural Gas Corporation Limited (ONGC)
Civil Aviation Department
Steel Authority of Indian Limited (SAIL)
Indian Railways
Power Sector (NTPC / NHPC Ltd.)
Bharat Electronics Limited
Indus tan Aeronautics Limited (ISRO)
Software Industries (ALL MNC’S) (HAL)
Teaching / Research
Government Sector

Here is B.Tech. (Electronics & Communication Engineering) colleges list

Indian Institute of Technology Kharagpur (IIT KGP)
Indian Institute of Technology Roorkee (IIT Roorkee)
Birla Institute of Technology and Science (BITS-Pilani)
Indian Institute of Technology - Banaras Hindu University (IIT-BHU)
Indian Institute of Technology (IIT Guwahati)
National Institute of Technology, Tiruchirappalli
National Institute of Technology
National Institute of Technology, Surathkal
Birla Institute of Technology..
Jadavpur University (Faculty of Engineering & Technology)
International Institute of Information Technology, Hyderabad (IIIT-H)
Netaji Subhas Institute of Technology
Indian Institute of Information Technology, Allahabad
Motilal Nehru National Institute of Technology
PSG College of Technology
PEC University of Technology
Bengal Engineering and Science University
Malaviya National Institute of Technology
Visvesvaraya National Institute of Technology
Thapar University
National Institute of Technology, Rourkela
College of Engineering Pune
Manipal Institute of Technology, Karnataka
Jawaharlal Nehru Technological University Hyderabad
R.V.College of Engineering
Veermata Jijabai Technological Institute
University College of Engineering (Osmania University)
Sri Sivasubramaniya Nadar College of Engineering - Tamil Nadu
Sardar Vallabhbhai National Institute of Technology
Maulana Azad National Institute of Technology
Nirma University - Institute of Technology
BIT Sindri
Coimbatore Institute of Technology (CIT)
Vellore Institute of Technology (VIT)
Maharashtra Institute of Technology
National Institute of Engineering, Mysore
National Institute of Technology, Jamshedpur
BMS College of Engineering
National Institute of Technology, Durgapur