Domain Driven Transformation—How to Bring Back Sustainable Architecture to

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" summary

Shows a concrete four‑step recipe: domain rediscovery, model the greenfield target, align the monolith to that model, and move incrementally. Uses collaborative modeling (domain storytelling, event storming), a catalog of domain‑driven refactorings, and sprint‑sized technical steps. Demonstrates extracting the risk assessment bounded context from a 20–25 year leasing monolith by creating an empty namespace, copying voteContract, switching callers, deploying, then deleting the old code. Emphasizes measurable modularization, stabilized CI/CD first, and evolutionary, deployable changes.

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" chapters (15)

1. 0:00🚀 Introduction: A Story of Transformation in Software and Architecture
2. 3:00The Legacy System: Problems with Old Monolithic Software
3. 7:00How to Approach Legacy Systems: Modernize, Don’t Replace
4. 9:30Understanding Domain Knowledge Hidden in Legacy Software
5. 12:00The Need for Modularization in Legacy Systems
6. 15:00Identifying and Diagnosing the "Diseases" of Legacy Systems
7. 18:00Strategic vs. Tactical Refactoring: A Two-Pronged Approach
8. 21:00Domain Rediscovery: Putting the Legacy System Aside to Understand the Problem
9. 24:00Modeling the Ideal Architecture and Target State for Modularization
10. 26:00Aligning Current Architecture with Target Architecture
11. 29:00Breaking Down Monolithic Code: Identifying Boundaries and Subdomains
12. 33:00The Role of Domain Storytelling and Collaborative Modeling
13. 36:00Moving From Monolith to Modularization: Step-by-Step
14. 39:00Technical and Socio-Technical Transformation: How to Organize Teams for Success
15. 42:00Conclusion: Embrace Small, Evolutionary Steps in Domain-Driven Transformation

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