What really makes you a software developer?

Why this question?

Lastly, I'm trying to enhance my personal brand, and as a result of that, I've also had to describe myself.

I had the temptation of present myself as a software developer, but some doubts seized me.

What is in fact a software developer?

What makes you one?

How much time or experience do you need to be considered a software developer?

I'd like the incredible community of DEV to answer these questions and share knowledge, and opinions in the comments below .