How I operate as Senior Software Engineer everyday

In recent times, I have been asked by several people what I do everyday at work. Most of time, I tried to answer it simple. Working in a fintech, my favourite answer is, I design system that helps people to manage their money. But this is a very vague answer to what I really do.

To few, what I do seem very complex, to few it’s very easy. My father said a few days back

How tough your job could be? You just sit all day in a chair.