The senior engineers should have been more honest ("screw you and your pet language, we won't be using this garbage here") instead of getting the author to run various useless side quests.
This is the company he is talking about: https://www.hologram.io/blog/why-we-dont-hate-php
They love PHP and Python. Good for them, I don't like those languages but why would I get a job there and try to get them to use a language with a pretty much completely opposite philosophy?
It would be like getting a job at a vegan restaurant and suggest they should have wagyu beef on their menu because it's so tasty and everyone loves it.