Test scaffolding, a real pipeline, and an incremental refactor that turned a fragile legacy app into a calm one.
No tests, manual deploys, and tribal knowledge. Every release was a gamble and the team was burning out.
We added characterisation tests around the riskiest paths, containerised the app, built CI/CD, then refactored behind that safety net.
Deploys went from monthly and scary to daily and boring. On-call escalations dropped by two thirds.
We wrote tests that captured current behaviour — bugs included — so the refactor could not change outcomes silently.
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