The just-say-no engineer was a ZIRP phenomenon

The 'just-say-no engineer' archetype — senior engineers who act as gatekeepers, blocking most changes in the name of quality — thrived during the ZIRP era (2008–2022) when tech companies had bloated headcounts and little pressure to ship. With the end of zero interest rates, companies refocused on revenue and productivity, making this archetype a liability rather than an asset. The shift is often blamed on AI, but the author argues it would have happened regardless — AI merely adds insult to injury by flooding codebases with generated code that management now actively wants merged. The just-say-no engineer still has a place in 'pure engineering' domains like compilers and core infrastructure, but their broad influence in product-driven companies is a relic of an unusual economic era.