> graduates from lower tier colleges
Lower tier colleges have gotten much better in quality too.
I remember Indraprashta came to recruit Indian PhD students at my Ivy League tier college to become tenure track CS/ECE/EE professors.
Plenty of lower tier IIITs and regional engineering colleges are getting Western or Top Tier IIT trained faculty, and students are higher quality now as well.
As the child of a dad who attended one of these no name RECs who ended up becoming tech leadership here in the Bay, I'm glad that this democratization has occurred. The BITS Pilani and IITian uncles were very snobby and annoying.
What you cite is one factor. Another factor is access for students. Once upon a time, curious students had two choices: buy books to learn on their own; or go to whatever low quality teachers they had. Cheap internet, YouTube, LibGen, other resources help students as long as the latter desire to learn.
Quality is a relative term. We have been hiring in India for past 2 years. I can tell you there is lot of noise and no substance. There is only handful of good candidates and they know they are good.
In India it's crazy because culturally they focus so much on the credential. It wasn't that long ago that if you were an Indian engineer and you weren't a graduate of IIT, you had no chance of working for these companies. The entire Indian hiring funnel is based on that system and it will be hard to change.
There is a a reason why people focussed on IITs. To be very clear, not every engineer graduating from IIT is good. But chances of finding a good engineer is probabilistically higher in IITs than other place. Also, when you are manager or startup, credential-led hire is medal of honour.
> I see the same trend with Google, Facebook, okta etc
Facebook doesn't have a Engineering office in India.
Doesn't Infra have a presence in Bangalore?
There YouTube channels, blogs, website tuned to pass these interviews in India.