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Learning by doing & What I learned by messing it up.

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I’m @sutto

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--fail-fast

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I’ve made a lot of mistakes.

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git push -f

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Restarting the wrong server…

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Tasks that are supposed to send 1 email, sending many…

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Know what’s easier up front

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Unknown Unknowns versus Known Unknowns

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Spend time learning the abstractions

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If you’re working on layer n,understand layer n-1.

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Understand encoding.

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Floats (and JS numbers!)

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Understand your database

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And by that, know how indexes work.

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It’s hard to fix bad data.

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Design for Failure.

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and how to deal with it.

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Monitoring

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Metrics

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Exception Tracking!

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Circuit Breakers

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Finally, Feedback is important.

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The faster the loop, the better.