Hey, it’s a good decision to do MBA after completing B.Tech CSE course .

As you from CSE field you can choose specialization as :

IT Management
Human Resource (HR) Management
Finance Management
Infrastructure and Real Estate Management
Entrepreneurship Management
Telecom Management
Virtual Management
Project Management
Process Management
Program Management
Marketing Management
Knowledge Management
Quality Management
Communication Management
Construction Management
Customer Relationship Management
Co-operative Management
Design Management

Some other specializations that may also you can choose:
Facility Management
Fashion Management
Healthcare Management
Cost Management
Executive Management
Export Management
Event Management
Crisis Management
Change Management
Shipping Port Management
Operations Management
Risk Management
Personnel Management
Rural Management
Population Management
Sales Management
Brand Management
Administrative Management
Environment Management
Biotechnology Management
Association Management
Business Process Management
Logistics Management etc..