I know that these four companies shop in India, though I have no idea whether they shop in Delhi. You would need to sign up and check their job boards.
www.grassrootsindia.in
[
www.freemangroupsolutions.com]
www.rnbresearch.com
[
www.bareinternational.com]
We have had some issues recently with freemangroupsolutions in this country as they are not adequately funded and take several months to pay and reimburse shoppers. Bare International does shops here and pays in a timely fashion. The other two companies seem indigenous to India.
Good luck and happy shopping!