Building Reusable Architecture for Large Next.js Applications
next.js•Apr 3, 2026

Building Reusable Architecture for Large Next.js Applications

Every Next.js project starts clean, but as it grows, architecture issues arise. This article provides a practical guide to building layered, reusable architecture in Next.js, covering topics such as the App Router's colocation model and Turborepo.

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Key summary

This article provides a practical guide to building layered, reusable architecture in Next.js. It covers topics such as the App Router's colocation model, building scalable folder structures, sharing logic across apps with Turborepo, and designing a testing strategy.

TL;DR

  • Layered architecture solves coupling without intention
  • App Router's colocation model allows for colocated components and data fetching
  • Turborepo enables sharing logic across apps
  • Server Components draw clean data-fetching boundaries
  • Design a testing strategy that matches your layer structure
  • Wiring up a CI/CD pipeline that only builds and tests what actually changed
  • Building a scalable folder structure around features
  • Avoiding common pitfalls in architecture design
#next.js
#architecture
#monorepo

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