I design and build data platforms, distributed systems, and the tooling around them - SDKs, APIs, contracts - plus open source on the side. Mostly JVM (Scala, Java, Kotlin) and Python, with a growing Rust and Go habit. I write about it on my blog , occasionally show up at conferences to say the same things out loud, and sometimes help the people running the show when they need an extra pair of hands behind the curtain.