A Python application can appear healthy while problems are quietly growing underneath it.

Features are being released. Customers can log in. The API responds. Nothing seems urgent.

Then traffic increases, a dependency is updated, or a new developer joins the project. Suddenly, simple changes take days, errors become difficult to reproduce, and nobody wants to touch certain parts of the code.

These problems do not necessarily mean Python was the wrong choice. They usually mean the application has grown beyond the engineering practices used to build its first version.

Here are five signs that your Python application may need a more experienced engineer.