If you don’t know by now, Bitcoin is open source code. That means that anyone can see how it works, and anyone can contribute to the codebase.
If your interested in contributing, you can check out the code here –> Bitcoin Code
You’ve probably also heard of something called a ‘White paper’.
“A white paper is a report or guide that informs readers concisely about a complex issue and presents the issuing body’s philosophy on the matter. It is meant to help readers understand an issue, solve a problem, or make a decision.” — Wikipedia
I like to think of Bitcoins white paper as a Bitcoin Declaration of Independence from Fractional Reserve Banking. aka Fiat.
Check out the white paper here –> Bitcoin White paper