When developers stop thinking in terms of “my code”, or “your code”, but rather, accept the entire project as “ours”, everyone will feel an internal obligation to fix a problem when one sees it.
Let’s Debunk the Code Ownership Myth
Preslav Rachev

This is a great approach and what we strive for at Pixite. There is no ownership of the individual code itself but rather a collective ownership of something greater, the end product. This keeps everyone on a level playing field allowing devs to learn from each other and forget about egos.