When do I need to hire a real developer?
Three triggers: you are handling payments, health data or anything regulated; you have a production incident you cannot diagnose; or you have stopped being able to predict what a change will do. The first is a planned hire, the other two are already late.
From How to build an app without code: an honest guide, published 9 August 2026. That article is where the reasoning behind this answer is set out, including what it does not cover.