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Superstar Developer is your greatest risk
Does delivery stop when someone’s out of office?
 • 
Valentina Jemuović
2
TDD in Legacy Code - Component Tests - Backend
How can Backend & Frontend teams get isolated feedback whether their part works, without waiting for the slow Acceptance Tests?
 • 
Valentina Jemuović
5
TDD is NOT about high code coverage
Code Coverage shows you what you haven't tested, not how good your tests are
 • 
Valentina Jemuović
2
Technical Debt
The hidden cost of copy-paste code
 • 
Valentina Jemuović
16
Hexagonal Architecture - Internal World (The "inside")
Our system core logic shouldn’t be affected by anything external
 • 
Valentina Jemuović
2
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.
 • 
Valentina Jemuović
6

September 2025

ATDD: Don’t skip tests even for simple code
Learning the hard way: even “simple” code needs tests. Automated testing isn't just for big complex projects.
 • 
Valentina Jemuović
6
Why Unit Tests & E2E Tests don’t protect us in production
Watch now | Why do many test automation initiatives fail in reducing regression bugs?
 • 
Valentina Jemuović
2
1:37:14
From Unit Tests to Acceptance Tests - Why I shifted my focus?
I focused on HA & TDD for years. Why I shifted my focus to ATDD?
 • 
Valentina Jemuović
4
99% of devs think they practice CI — they don’t.
CI isn’t just having a pipeline. If you're not practicing TBD and don't have tests, then you are not practicing CI.
 • 
Valentina Jemuović
2
How to introduce ATDD in Legacy Code? (in 3 months)
You should stay with your Big Ball of Mud, and stay with your Messy Code. I'll explain why and what you can do instead.
 • 
Valentina Jemuović
2
Code Coverage vs Mutation Testing (Code Example)
How do you know if Unit Tests are protecting you against regression bugs? Code Coverage can't help, because it checks only whether you executed code…
 • 
Valentina Jemuović
14
© 2025 Valentina Jemuović, Optivem
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