Layer vs Feature Architecture: How You Structure Code Shapes Project Maintainability

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A technical discussion on DEV Community highlights two dominant software project organization strategies: Layer Architecture (grouping files by technical responsibility) and Feature Architecture (grouping by functionality or domain). Layer Architecture places all controllers, services, and repositories together regardless of which feature they belong to, while Feature Architecture keeps all code related to a single feature in one place. Each approach has distinct trade-offs in terms of maintainability, coupling, cohesion, and scalability. Experts note there is no universally superior model, and the right choice depends on application size, complexity, and how the project is expected to evolve. Well-structured file organization is described not merely as aesthetic preference but as a direct representation of an application's architectural boundaries and responsibilities.

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