What makes you think "I work at Google" provides sufficient data to an interviewer such that they should exempt you from their interviewing process? The fact that you have a job somewhere else says very little.
I'm not saying I'm immune from interviews. I'm saying it's proof I have chops.
Technical interviewing in a broken process. I've given almost 200 technical interviews at Google, and I've seen all kinds of results. But, I believe Google's results. Having worked at Google longer than anywhere else I've ever worked, I can say that the people are incredible, and it's a direct result of the interviewing process. We interview someone for a set number of interviews (N≤8 nowadays) and we make a decision. I can count on one hand the number of people I think are deadwood.
All I'm saying is the "interview" process of having people do projects for you is broken. You will filter out a lot of people with jobs they are kicking butt at.