Earlier quoted context omitted.
I don't think this is true at all. I'm not saying that they will never hire an extra person in case they find two truly exceptional people (exceptional as in they feel like they really are missing out sending one home, not just that they are good programmers), but I'm sure that most of the times the hiring mechanism is quite compartmented. If you interview with a specific group/organization, they need some people to…
"I'm sure that most of the times the hiring mechanism is quite compartmented...It's not like the people who interview you are interviewing you for the entire Google." Absolutely, utterly incorrect. This has all been covered publicly by Peter Norvig[0]. Quoth he, "Another hiring strategy we use is no hiring manager. Whenever you give project managers responsibility for hiring for their own projects they'll take the be…
But what I know for sure it's not like that necessarily anymore, since I talked to many people about their interviews at google and I know some googlers as well that confirmed what I said (which is the reason I wrote it). Even when I talked to google myself, it was for an individual group, not the entire company (in my case, unlike my friends, it wasn't a software engineer position, though).
Also, and I can tell you this with 1000% certainty, even though they like to say sometimes the opposite, the people I know told me that Google instead has hired more commonly than you can think people that are sub-standard, it's not the normal usual thing, but it has indeed happened.
Also, the recruiters I met, had no clue about what a person with a certain specific Resume could have done in the company. They told me that they often decide whether or not to commit about trying to get a person interviewed based on if they believe they will get hired for a specific position (since that is how they get paid), not necessarily based on who they think is a good general candidate.
Now, I'm not saying that this is a rule, but even if you look at the positions posted now on the company website, they are so detailed and specific that it would make no sense to interview a person at the company level.
It can happen at the new grad level, but I doubt it happens on a common basis. I could be wrong, but I just speak by what I heard first hand.
Of course if with project you mean a specific individual project than I agree, but the company now it's rather big, there is many organizations and stuff that probably don't even know what the others do (still comments from Googlers). This is quite normal since Google can be compared to a campus, in any University nowadays you can be in the same department and do research in a field that is completely unknown to the person sitting next to you in the office since they might work on a different field and it takes years to actually start understanding something about it.