Roman Imankulov

Roman Imankulov

Full-stack Python web developer from Porto

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03 May 2020

On the Code Ownership

Photo by Goran Ivos

Code ownership is a smell, and we need to avoid it. When several developers contribute to the same codebase, several great minds are thinking of the same problem, which eventually results in a better solution. On the opposite side of the spectrum, with strong code ownership, you inevitably end up with a code that is easier to rewrite than to understand by others.

I took this as granted until I came across a Microsoft research that contradicted my common sense. They showed that code ownership results in higher code quality and fewer bugs.

Code ownership and software quality

That the more engineers modify a file, the higher the number of bugs that are linked to this file and that if there is one primary contributor, the chances for a file to be buggy decreases significantly.

Looking further, I found out that researches and practitioners went to both extremes. There is more to read at

I wish I could culminate this post with an elegant theory or at least a rule of thumb that would embrace both points of view, but nothing beyond helpless “it all depends” and “the truth lies somewhere in between” comes to mind. I keep this question open to myself.

Roman Imankulov

Hey, I am Roman, and you can hire me.

I am a full-stack Python web developer who loves helping startups and small teams turn their ideas into products.

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