What causes most production disasters ?

Self-testing devs missing edge cases they never imagined — scripts without dry-runs, payments sans full-browser matrices, accruals blind to mid-month hires.

Does independent QA prevent outages?

Not 100%, but slashes 'em hard by injecting fresh viewpoints that catch builder-blind spots, like those 40K vanished members.

How do I vet an agency's real QA?

Demand a recent bug report with steps/severity/fix, plus post-deploy monitoring SLAs — not just 'we test.'

🧠 Engineering Culture

40,000 Users Vanished: The QA Blind Spot Behind Production Disasters

One script wiped out 40,000 loyalty accounts overnight. No dry run, no merge logic—just blind trust in staging data with 300 rows. Here's the habit that fixes it.

theAIcatchup Apr 10, 2026 3 min read

⚡ Key Takeaways

Production disasters stem from self-testing, not bad code—independent QA introduces unbiased eyes. 𝕏
Demand bug reports and prod-scale tests from agencies; skip the 'QA included' fluff. 𝕏
Market precedent: Knight Capital's $440M loss proves untested changes kill fast. 𝕏

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theAIcatchup

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#QA best practices #agency QA #agency vetting #deployment failures #dev testing pitfalls #independent QA #production disasters #software testing #software testing failures

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Originally reported by dev.to

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