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Josian Chevalier

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You Thought Technical Debt Was the Worst? Meet Design Debt!Devoxx France 20262026-04-22
The talk examines design debt (accidental design debt) as a deeper cause behind persistent technical debt, explaining how practices like KISS and YAGNI can…
Talk in French on
Model Tension HeuristicsDDD Europe 20252025-06-02
Argues that lingering design debt shows as concrete, named tensions — spork effect, model fragmentation, model sclerosis — and gives heuristics to find them in…
Talk on
Model Mitosis: No More Confusing Microservices with MonolithsVoxxed Days Luxembourg 20242024-06-20
Explains how to decide between a monolithic application and microservices by focusing on the data and domain model. Covers causes of improper splits (model…
Talk in French on
Model Mitosis: a dynamic pattern to deal with model tensionsCraft Conference 20242024-05-30
Claim: when a single model accrues conflicting needs, split it by behavior into domains, carve a shared kernel for identical invariants, and…
Talk on
Mitosis PatternGeeCON 20242024-05-15
Claims a practical way to evolve an MVP into a modular system by iteratively duplicating and specializing models to resolve “model tension,” then only moving…
Talk on
Interview of Julien Topcu and Josian ChevalierDevoxx France 20242024-04-17
Model mosis describes an iterative way to find microservice boundaries by observing runtime behavior and tolerating blurry responsibilities until evidence…
Interview on
Model Mitosis: Stop Confusing Microservices and the MonolithDevoxx France 20242024-04-17
Provides a concrete method called Model Mitosis for deciding when and how to split a monolith into services: identify behavioral boundaries and extract two…
Talk in French on
Getting Started with Domain-Driven Design without Fighting the Wrong BattlesVoxxed Days Luxembourg 20232023-06-21
An introduction to Domain-Driven Design (DDD) focused on practical first steps: identifying core domains, defining bounded contexts, and using ubiquitous…
Talk in French on
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