Hi Jasbir,

Although there are less Government job opportunities in the field of Mobile App Development, but there are some Government Organizations which recruit App Developers. Some of them are DigiLocker it's an initiative of Digital India. Another one is Ministry of Electronics and IT and National e-Governance Division. 

If you are going for Mobile Application Development then you'll find most of the opportunities in Private Sector. Also the positions offered by the Government Organizations require experience. It'll be difficult for a fresher to start from Government sector.

Hope this information will help you!