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A mistake changed my career — production went down at 2am.

The worst bug of my career didn't wake me with an error. It woke me with a phone call. 2am. A paying customer, locked out of their own account, more confused than angry — which was worse.

  • Developer's system success message was not always trustworthy
  • Bug caused customers to be locked out during brief window
  • Developer learned importance of separating code writer from verifier

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