I'm a Performance Engineer with 14 years in production software, across five companies from scrappy startups to large platforms.
My job is finding where time goes and getting it back — slow builds, hot code paths, cold starts, wasteful allocations. I profile first and optimize second, because the interesting bottleneck is almost never the one you'd guess.
Lately that’s meant a lot of build-system work: parallelizing archiving, fixing task graphs, and making caches actually cache. My open-source parallel-zip-gradle-plugin came straight out of that.
I care as much about the write-up as the win. Every optimization here comes with the numbers, the method, and the surprise — so it’s useful to someone else, and to future me.
Based in Wrocław. Always happy to talk about a stubborn bottleneck.