While hiring, personally I look for the candidate’s quality of experience. Quantity (Number of years of experience) does not really matter.
As Conan rightly pointed out:
Watch out for people with “10 years” of experience … it’s sometimes 1 year of experience, repeated 10 times
In fact I would go to the extent of saying that their educational background also does not matter. (Sometimes it actually negatively impacts their impression. Someone with a CS background should at least know theoretically about different computer architectures)
The only time I look at number of years of experience is, when someone claims that they have been doing ‘x’ for ‘y’ years. And during discussions about ‘x’ related topics, its apparent that the person does not have the expected depth on the topic. Then I ask myself, “if this person does not have the required depth after spending ‘y’ years, how good is this person at picking up stuff and internalizing it?”
Of course, we need to give them the benefit of doubt. They might be working in a highly viscous environment.