As you want to get the details of career or scope after B.Tech Computer Science Engineering so here is the information of the same for you:

Career in Private sector after B.Tech in Computer Science:
Some of the top IT companies offering placements for the B.Tech Computer Science graduates are listed below.

Infosys Technologies
Hewlett-Packard India
Cognizant Technology Solutions
Wipro
HCL Technologies
Cisco Systems India
Dell
Microsoft
IBM India
Oracle
Intel
Accenture
Tech Mahindra
HCL Infosystems
Patni Computer Systems
Mphasis
Satyam Computer Services
UniSolsInfosyatems
NIIT Technologies
Global Software
Alliant Technologies Private Limited
Allianz Cornhill Information Services Pvt. Ltd
Matrix Solutions Pvt. Ltd
All India Online Pvt. Ltd
Voicepack Infotech Private Limited

Career in Government sector after B.Tech in Computer Science:
National Thermal Power Corporation (NTPC)
Damodar Valley Corporation (DVC)
Oil and Natural Gas Corporation (ONGC)
Bharat Heavy Electricals Ltd (BHEL)
Food Corporation of India (FCI)
Centre for Development of Advance Computing (C-DAC)
Hindustan Electronics
Hindustan Aeronautics Limited (HAL)
Indian Railway
Indian Space Research Organization (ISRO)
Defence Research and Development Organization (DRDO)
Electronic Cooperation of India Limited (ECIL)
Airport Authority of India (AAI)
Steel Authority of India (SAIL)
Combined Defense Service (CDS)
New India Assurance Company Limited
Bharat Electronics Limited (BEL)

Career Abroad after B.Tech in Computer Science:
Some of the IT companies in various foreign countries are listed below.

Citefa, Argentina
Rexio , Argentina
Haier, China
Indumil, Colombia
Siemens, Germany
Samsung,Korea
Hitachi, Japan
Dell, United States
Vetelca, Venezuela
Bravox , Brazil
IBM, United States
Avibras, Brazil
Nikon, Japan
Sanyo, Japan
Sony, Japan
Toshiba, Japan
Canon, Japan
LG, Korea
Alfa, Mexico
Telcel, Mexico
Philips, Netherlands
Acer, Taiwan