After doing M.Tech (Engineering Physics) form IIT, you can defiantly get the good job, you can apply in private and government sectors.

You can apply for the following job titles:

Technical Assistant
Information Analyst
Associate Professor
Instructors
Laboratory Assistant
Engineering Analyst
Digital Signal Processing
Delivery Manager

Government originations in which you can apply for the job

DRDO
ISRO
Bhabha Atomic Research Centre (BARC)
Government colleges
ONGC
IOCL(Indian Oil Corporation Limited)
MNIT Allahabad
SAIL
ECIL(Electronics Corporation of India Limited)
BHEL

Private companies in which you can apply.

TATA MOTORS
MAHINDRA
TISCO
BAJAJ
PRIVATE BANK
BHILWARA ENERGY LIMITED
IBM
TCS
Maruti suzuki,
Tata motars,
Mahindra,
Bajaj,