$ whoami → I build engineering systems, dabble in AI, and write occasionally
When someone senior pushed back on why we'd isolated our callback servers instead of just scaling vertically, I stopped arguing mid-explanation. Not because he was right—because I couldn't articulate defaults my team had long since internalized.
I set out to raise test coverage across a large monorepo. Five weeks later I'd also rewritten the test pipeline, the coverage gate, the deploy workflows, and half the backend dependency graph. Some of it was forced. Some was learned. None of it was on the ticket.
SBT's defaults run your test suite sequentially in a single JVM. On an 8-core box with tens of thousands of tests, seven cores stay idle the whole run. Here are the settings that fix it.