Came here to record my anecdotal data and say that this comment is blatantly false and very misleading.
Let us take FANG one by one.
Facebook: There is very little QA in the Hyderabad office of Facebook. Most of the work is in software development area.
Amazon: Are you kidding me? Many high profile projects of Amazon such as Amazon Prime and Amazon Pay are executed in Bangalore. The Bangalore office of Amazon developed many critical services for Amazon Prime from scratch.
Netflix: Can't talk much about Netflix because most of the work that does Netflix does in India is in the business, legal and marketing area.
Google: Are you kidding me again? A significant portion of some Google infrastructure services and some Google public services are developed in Bangalore.
Source: I have worked in two of the FANGs in Bangalore and I have friends in the others.
And I don't know where you are getting your heavily biased data point about NetApp from. If you take one data point and say the whole company works on internal PHP tool, well then here is a surprise for you. All companies work on internal PHP tools or something to that effect. They have their enterprisey systems to run. Every company does that.
Whoever has told you this very naive view of NetApp has forgotten to tell you that NetApp also works on data storage systems, cloud analytics, performance analytics, OpenStack based private cloud orchestration (whole distributed software systems developed from scratch in Bangalore). Before you keep spreading this kind of false data about the top-tier software companies in Bangalore, please lookup NetApp ONTAP and enlighten yourself.
Source: I have worked in NetApp too for 3 years.