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What Running Real Software Taught One Developer About Life After the Demo

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A software developer shares lessons learned from building and operating live services, noting that the experience diverged sharply from popular 'build a SaaS in 30 minutes' tutorials. The key insight is that once a user pays, the software becomes a promise — covering correct billing, data persistence, and reliable cancellations — not just functional code. Real production environments involve edge cases like duplicate webhook events, failed database writes, and abandoned checkouts that AI-generated code rarely anticipates. The developer also discovered that servers face automated scanning from bots and vulnerability crawlers within hours of going live, long before any real users arrive. These realities, the author argues, demand human judgment and responsibility that no prompt or model can fully substitute.

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