Hello guys, It was Tuesday morning when the Slack notification appeared, "Production is down. Database migration failed. We're losing $15,000 per minute." The developer who shipped the code felt sick. The code review passed. The tests passed. Nobody caught the edge case. Nobody caught the subtle bug that only manifests under specific database conditions. By the time they rolled back, the damage was done. Lost revenue. Lost customer trust. Lost sleep. While this story is fictional the situation is real and we have seen it manifest on different place in different shape.
