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Gustavo J.
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Modular Architecture in Next.js

How to structure large-scale applications for maintainability and scalability using modern patterns.

Gustavo J.

· 8 min read · Architecture

Beyond the /app directory

Next.js gives us a great starting point with the App Router, but for large systems, we need more.

Key Principles

  • Separation of Concerns: Keep business logic away from the UI.
  • Dependency Inversion: Use interfaces to decouple modules.
  • Shared UI Library: Building a consistent design system.

By treating each feature as a standalone module, we can scale teams and codebases without the usual friction of a monolith.