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Clean Architecture on the Backend: Data Flow
How does data flow through the system?
Oct 31, 2025
•
Valentina Jemuović
20
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Clean Architecture: Use Cases Are NOT Services
Code Example
Jan 22
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Valentina Jemuović
17
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TDD: 1 unit test ≠ 1 class
TDD misconception: The class is the unit of isolation. That's wrong! Instead, the behavior is the unit of isolation.
Oct 3, 2025
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Valentina Jemuović
16
10
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Modern Hexagonal Architecture: Testing for Backend
How can we test the Backend?
Nov 28, 2025
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Valentina Jemuović
14
2
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Unit Tests are NOT enough!
You have 100% coverage. All the unit tests are passing. But then, in production, a horrible bug happened.
Apr 21
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Valentina Jemuović
6
1
2
DDD + Clean Architecture: Where to Put Validation Logic
Should validation go in the API, application layer, or domain?
Apr 16
•
Valentina Jemuović
12
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3
Hexagonal Architecture: Ports Are NOT Just Interfaces
Code Example
Apr 9
•
Valentina Jemuović
7
3
4
TDD: If Your Test Never Fails, It’s Broken
The RED step
Apr 7
•
Valentina Jemuović
11
2
3
Clean Architecture: DTOs Are NOT Just Wrappers
Code Example
Apr 3
•
Valentina Jemuović
9
4
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Clean Code Is NOT Optional
It’s tempting to write code fast...
Apr 1
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Valentina Jemuović
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