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Today I Learned

Today I Learned

Short learnings from real engineering

Small things I learn while building. Not blog posts — just concise notes on gotchas, patterns, and surprises I encounter day-to-day.

6 entries5 categories

Docker layer cache order matters — put COPY last

Feb 15, 2025dockerdockerfilecaching

Go defer inside a loop doesn't run until the function returns

Feb 10, 2025godeferloops

☸️Kubernetes

Kubernetes: liveness vs readiness probes are not the same thing

Feb 1, 2025kubernetesk8sprobes

AWS S3 now provides strong read-after-write consistency

Jan 25, 2025awss3consistency

PostgreSQL: JSONB is almost always better than JSON

Jan 18, 2025postgresjsonjsonb

Go maps are not safe for concurrent reads and writes

Jan 10, 2025goconcurrencymaps