Johannes Rost
summary
Describes a practical migration from a legacy monolith to a modular system using Domain-Driven Design: identifying domain seams, defining bounded contexts, and enforcing a ubiquitous language in code and tests. Recommends the strangler pattern for incremental extraction, API contracts and independent CI pipelines to avoid big-bang rewrites, and gives concrete steps for discovering domain boundaries, splitting repositories, and making modules independently maintainable and deployable.
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