Hexagonal Architecture in Next.js, a resume

Next.js Hexagonal Architecture Template Repository

Hello, dear fellow developers and enthusiasts of architectural design patterns! I’m thrilled to share with you my journey and insights into one of the most intriguing and beneficial architectural patterns for frontend development: the Hexagonal Architecture, especially tailored for Next.js projects. As the creator of the next-hexagonal-architecture template on GitHub, I’ve delved deep into the intricacies of applying this architecture in a real-world scenario. Today, I want to unfold the complexities, advantages, and some challenges you might face while adopting this approach in your Next.js applications. Moreover, I aim to inspire and encourage your contributions to this evolving project.

Understanding the Hexagonal Architecture

At its core, Hexagonal Architecture, also known as the ports and adapters architecture, champions the separation of concerns. This principle is fundamental in creating a divide between the internal workings of an application—its domain logic—and the external interactions through designated ports and adapters. Such a design facilitates a modular, easily testable, and scalable application structure, which is critical in today’s dynamic development environments.

The Project Structure: A Closer Look

The next-hexagonal-architecture template is designed with meticulous attention to embody the principles of hexagonal architecture. Let’s break down its structure:


At the heart of the architecture, the modules directory serves as the nucleus for core business logic. It houses subdirectories like welcome, encapsulating application services (createPeople, getAllPeople), domain entities (People), and repository interfaces (PeopleRepository). This setup ensures a clear demarcation of business logic from other application concerns.


The sections directory brings the user interface to life, containing UI components and contexts such as WelcomePeopleCard, WelcomePeopleCreate, and WelcomePeopleList, alongside WelcomeContextProvider. This separation emphasizes the adaptability and reusability of UI components, streamlining development and maintenance.


The app directory orchestrates the application’s overall layout and page structure, with files like layout.tsx and page.tsx ensuring a cohesive user experience.

Embracing Complexity: Pros and Cons

Adopting hexagonal architecture within Next.js projects is not without its challenges. The initial setup and learning curve can be steep, as developers must familiarize themselves with the concepts of ports, adapters, and the separation of domain logic from UI and infrastructure. However, the payoff is significant:

  • Pros: Enhanced maintainability, scalability, and testability. The architecture allows for easy adaptation to changes in business logic or UI, and facilitates integration with external services through well-defined interfaces.
  • Cons: The complexity of setup and potentially increased initial development time. Developers new to the pattern may require additional time to grasp the architectural nuances.

Contributing: Join the Journey

The journey of refining and expanding the next-hexagonal-architecture template is ongoing, and your contributions can make a significant impact. Whether it’s adding new modules, refining existing ones, enhancing documentation, or contributing to the test suite, there’s a role for everyone passionate about building scalable and maintainable applications with Next.js.


The Hexagonal Architecture offers a powerful framework for structuring Next.js applications, balancing flexibility with the discipline of separation of concerns. Through the next-hexagonal-architecture project, I aim not only to demonstrate this pattern’s benefits but also to foster a community of contributors eager to explore, challenge, and expand upon these ideas. Together, we can push the boundaries of what’s possible in frontend engineering, creating applications that are as robust and adaptable as they are innovative.