If you are in India, HasGeek's conferences are all for developers, and often pretty much the only conference on the topic in India (websites are still for 2014):

Feb 2015: Meta Refresh, on web UI (https://metarefresh.in) and Construkt Festival, on tech startups (http://construkt.me)

May 2015: Rootconf, on devops and cloud infrastructure (https://rootconf.in)

Jul 2015: The Fifth Elephant, on big data and analytics (https://fifthelephant.in)

Sep 2015: JSFoo, on JavaScript (https://jsfoo.in)

Dec 2015: Droidcon India, on Android (https://droidcon.in)

All conference videos are available at https://hasgeek.tv