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System Architecture

Domain modelling, service boundaries and data design for systems that need to stay changeable for years.

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Architecture work that produces decisions, not diagrams. I start from the domain and the real read and write patterns, then define the boundaries, the data model and the contracts that follow from them.

The output is written down with its trade-offs, so the decisions can be revisited on evidence later rather than reconstructed from memory.

Engagement process

  1. Discovery — current system, constraints, and what is actually causing pain
  2. Modelling — domain, data ownership and boundaries
  3. Review — walkthrough with the engineering team, adjust against their knowledge
  4. Documentation — decisions, contracts and the sequence to implement them
  5. Support — availability during implementation for the questions the document did not anticipate
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