Being oncall taught me everything
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A veteran infrastructure engineer reflects on 7.5 years of on-call duty managing distributed caching at Twitter, arguing that on-call experience is irreplaceable for developing both technical depth and professional maturity. Key lessons include the importance of tail latency over median, the value of simple architecture during crises, and how owning mistakes builds trust. The post also celebrates the camaraderie forged under pressure and argues that no engineer truly understands software until they've watched it fail in production.
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