About

I'm Marcos Augusto, a software engineer based in Brazil. By day I work at Nubank, mostly in Clojure, on systems that need to keep working for tens of millions of customers.

By night and weekend I build small things — finance trackers, expense readers, sim-racing telemetry dashboards — and increasingly, agent infrastructure on top of opencode and Claude Code.

What this blog is

A place to write down what I learn while doing the work. Not tutorials, not announcements — more like a public lab notebook.

• Agent skills, harnesses, orchestration. I use and curate a mixed set of agent workflows, some mine and some borrowed. I'll write about what holds up, what falls apart, and what is worth making your own.
• Clojure in production. Patterns, anti-patterns, and the occasional war story from working on large systems.
• Personal tools. The small fintech and tracker apps I build for myself — and the design decisions behind them.
• Sim racing. iRacing + SimHub dashboards, telemetry, and the weird native-code edges that come with it.

Stack I reach for

Clojure, TypeScript, Next.js, Flutter / Dart, Python, Postgres. Whatever the problem actually wants.

Get in touch

Easiest is X / Twitter or email. Code on GitHub.