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Clean Architecture on the Backend: Data Flow
How does data flow through the system?
Oct 31, 2025
•
Valentina Jemuović
20
2
4
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Clean Architecture: Use Cases Are NOT Services
Code Example
Jan 22
•
Valentina Jemuović
17
6
3
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
•
Valentina Jemuović
17
10
4
Modern Hexagonal Architecture: Testing for Backend
How can we test the Backend?
Nov 28, 2025
•
Valentina Jemuović
14
2
3
Writing code is cheap. Maintaining it is where the cost accumulates.
Everything went fast in the first sprints. But suddenly, as time went on, it took longer and longer to make a change. How to solve this?
15 hrs ago
•
Valentina Jemuović
7
2
3
TDD: Do NOT implement all behaviors at once
Code Demo
Jun 5
•
Valentina Jemuović
8
2
3
Batch Integration Is NOT CI/CD
Stop calling it CI/CD if you merge once a week
Jun 2
•
Valentina Jemuović
6
2
3
Clean Architecture: Controllers Should NOT Catch SQL Exceptions
Error Handling - API layer
May 29
•
Valentina Jemuović
12
2
4
Build + Deploy Is NOT a Pipeline
Most teams *think* they have a pipeline.
May 26
•
Valentina Jemuović
9
4
3
DRY is not about *code duplication*
DRY (Don't Repeat Yourself)
May 21
•
Valentina Jemuović
5
2
2
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