How to build an amazing MVP?

So how do you build an MVP the right way? Here’s a simple approach:

1. Define Clear Boundaries with Interfaces

• Each module should own its logic and expose only what’s necessary.
• Use well-defined interfaces to prevent tight coupling.
• Avoid direct dependencies between unrelated modules—use dependency inversion if needed.

2. Organize Code with Layers & Folders

Follow a structured package/folder convention:

• /application → Use cases, DTOs, service layer
• /domain → Business logic, aggregates, entities
• /infrastructure → Persistence, API integrations, framework dependencies

This keeps logic modular, predictable, and easy to navigate.

Separate domain logic from infrastructure—your business logic shouldn’t be tied to a database or framework!

3. Set Clear Development Rules

• Developers must respect module boundaries—no jumping across layers!
• Data should be accessed through well-defined interfaces, not directly from other modules.
• Follow dependency inversion to avoid leaking implementation details across the codebase.

4. Automate Architectural Checks in PRs

• Use tools like ArchUnit (Java), Structurizr, or dependency analyzers to enforce architecture rules automatically.
• Set up linters and static analysis to prevent unwanted cross-module dependencies.
• Run these checks in the CI/CD pipeline—if a PR violates architecture rules, it doesn’t get merged!

Why Does This Matter?

• Faster development – Developers can work independently within modules.
• Easier scaling – Modules can be extracted into services later if needed.
• Less technical debt – This structure avoids the mess of traditional monoliths.

At Welin, we help companies build scalable, well-structured architectures from day one, so they don’t have to untangle a mess later.