Software Engineer in Test (SET) at Google

Everyone who writes code at Google is a tester.
If you are an engineer, you are a tester.
If you are an engineer with the word test in your title, then you are an enabler of good testing for those other engineers who do not.

-James Whittaker, Jason Arbon, Jeff Carollo (2012), How Google Tests Softwarer (p. 4),
Addison-Wesley Professional