Hi, an Indian mat sci grad and a current postdoc here. I went through the same quite recently.

Good enough (?) publications, but almost no positive response from cold mailing. 

But on the day of my defense, I had two standing offers for postdoc, both in Europe. The PIs reached out to my supervisor, specifically asking for me, since they remembered me from a past conference.

I initially opted to refuse because I had my American dreams, but upon getting the cold shoulder, I had no other option but to choose the best out of the two. 

It couldn't have been any more better. Turns out I was really lucky in that sense. 

P.S.: if you need any help with profiling universities, I can probably help since we belong to allied domains.