$ whoami → I build engineering systems, dabble in AI, and write occasionally
Someone senior pushed back on why we'd isolated our callback servers instead of just scaling the API vertically. I stopped arguing mid-explanation — not because he was right, but because I couldn't put words to defaults my team had long since stopped questioning.
I started the quarter trying to raise test coverage on one monorepo. I finished it having also rewritten the test pipeline, the coverage gate, the deploy workflows, and most of the backend's dependency stack. None of it was on the ticket. All of it followed from the ticket.
SBT's defaults run tests sequentially in a single JVM. On an eight-core box with a big suite, seven cores stay idle the whole run. The four settings that fix it.