It affects outcomes directly — slower feature delivery, recurring bugs, and rising maintenance costs all trace back to this, and all of them hit budgets and timelines that non-technical stakeholders feel.

Watch for features consistently running past their estimates, the same bug reappearing in different forms, or developers avoiding certain parts of the codebase.

Usually cheaper to fix now than later — the longer disorganized logic sits in place, the more gets built on top of it, and the costlier cleanup becomes.

It matters most for anything that will keep growing — new features, new pages, ongoing changes. A static site that will never be touched again needs it far less.

Ask how reusable logic — like forms, data fetching, or permissions — is structured across the project, and whether it's built once and reused or rebuilt on every page. A specific, confident answer is a good sign.

Beyond a portfolio, ask how a team structures logic and architecture behind the scenes, how they handle testing, and how they've kept past projects maintainable as those projects grew. Teams that answer specifically, rather than vaguely, tend to be the ones worth hiring.