That age discrimination post VC infection is real. Back when I started in 90 we had senior engineers with white hair. I distinctly remember brushing aside my father's advice when he cautioned me about such things. "No, not in software. It is a pure meritocracy". Hah. (Implicit lesson: listen to your elders /g)
Second lesson then was that engineering as a career is for chumps; young ones: start your own business.