The theory has its roots here: https://en.wikipedia.org/wiki/Production_line https://en.wikipedia.org/wiki/Production_line https://en.wikipedia.org/wiki/Divisi

The theory has its roots here: https://en.wikipedia.org/wiki/Production_line https://en.wikipedia.org/wiki/Production_line https://en.wikipedia.org/wiki/Division_of_labour https://en.wikipedia.org/wiki/Division_of_labour Whether backend vs frontend is the right "seam" for division of labor depends entirely on the complexity of the systems at play, as opposed to some arbitrary generalization of all backends and frontends as you seem to be making here.