[damascus]

From Investopedia: Capitalism is focused on the creation of wealth and ownership of capital and factors of production, whereas a free market system is focused on the exchange of wealth or goods and services.

It's not the free market part that defines it as capitalism but rather the fact he owns the method of production. He owns the code he writes and he owns the business processes around those applications. He privately owns the capital assets (applications and business processes) which make the money.