I think that age is correlation, not causation. What’s really happening is two things. First, companies typically don’t like paying people lots of money (even if they are great at blowing millions on other mindless things). Second, these companies do not understand that their unwillingness to hire expensive people is causing months of bug-chasing and monkey-patching in their products. When your organization is under…
Agreed. I started working in tech when I was 22--now I'm over 30. I've never witnessed old-age discrimination. What I have witnessed are start-ups, built on newer tech, (AWS over on-prem, nosql over relational, etc), passing on candidates whose last reference book was the Data Warehouse Toolkit and still want to be called WebMasters.
The law of the tech industry is when you stop learning--at any age, you lose market value.