
| Phase | Weeks | What the engineer is doing | What you see |
|---|---|---|---|
| Embed | 1 to 2 | Scoping interviews with the sponsor and end users. Architecture design. CI/CD pipeline, test harness, and observability scaffolding stood up on day one. | A written scope doc, an architecture diagram, and a running pipeline with a hello-world deploy. |
| Build | 3 to 6 | First functional slice of the system. Weekly demos to real users. Tests written alongside the code, not after. | A working system used by real people by week 4. Weekly demo recordings. |
| Harden | 7 to 12 | Iteration on user feedback. Integration with systems of record. Load testing, error handling, cost controls, and security review. | A production-ready system passing your change advisory board and security sign-off. |
| Handover | Final 2 | Runbook writing. Documentation. Shadowing your ops or internal engineers. Locking in the optional support path. | Runbooks your on-call person can follow, documentation your next engineer can read, and a clear support arrangement. |
Engineering discipline is concrete from the first commit: version-controlled infrastructure, automated tests running on every push, structured logs, metrics, alerting, and deployment pipelines that roll back on failure. You get the standard of a senior in-house team, without building one.

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