I used to work on a product that had a bug component called (our product) > Frontend > Backend (of the frontend). I worked on (our product) > Backend, and so w

I used to work on a product that had a bug component called (our product) > Frontend > Backend (of the frontend). I worked on (our product) > Backend, and so whenever the frontend was sending me problematic requests I'd file bugs against the "Backend (of the frontend)". Their UI logic was irrelevant to me, more or less; I only observed their "backend" code's behavior. Of course when I say I worked on the "backend" I mean the part of this product that talked to other backends and storage layers. In a large enough distributed system, "frontend" and "backend" are relative rather than absolute terms...