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Why Your E2E Tests Didn't Replace Manual QA
Your team writes code faster with AI. But releases are still slow.
 • Valentina Jemuović
Spec-Driven Development: Make Specs Enforceable with ATDD
AI can ignore your spec — it can’t ignore a failing test.
 • Valentina Jemuović
DDD: Stop Making Your Domain a Data Bag
Your domain needs more than getters
 • Valentina Jemuović
Slow releases. Production bugs. And you already automated.
You automated, and manual regression testing is still there. Those two facts have the same cause.
 • Valentina Jemuović
Clean Architecture: One Class Per Use Case Is NOT Enough
Code Example
 • Valentina Jemuović
Refactoring Should NOT Touch Your Acceptance Tests
A “refactor” PR that changes the acceptance test or the DSL isn't a refactor — it's a behavioral change
 • Valentina Jemuović
Don't Let AI Multiply Bad Tests
AI learns from the tests you already have. If those are bad, you now get bad tests much faster.
 • Valentina Jemuović

August 2026

Clean Architecture: Use Cases Should NOT Catch Stripe Exceptions
Error Handling - Application layer
 • Valentina Jemuović
Senior Engineer ≠ Years of Experience
“I've been doing this for 15 years, so I already know.”
 • Valentina Jemuović
Hexagonal Architecture: Don't Follow the Diagram
Don't create a class just because the Hexagonal Architecture diagram has one
 • Valentina Jemuović
TDD in Legacy Code - Contract Tests - Components
How can Frontend & Backend Teams find out that they can't communicate, instead of waiting for slower Acceptance Tests?
 • Valentina Jemuović
The Best Architects Never Stop Coding
You can't feel what your own design costs unless you build something in it. And nobody is going to tell you.
 • Valentina Jemuović
© 2026 Valentina Jemuović, Optivem · Privacy ∙ Terms ∙ Collection notice
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