Senior Software Engineer @ Nubank
Frontend & Fullstack · React · Node.js · Clojure · LLM Platforms
I'm a Senior Software Engineer at Nubank — one of the world's largest fintechs — where I build internal AI/ML platforms that power data labeling at scale.
I care deeply about product ownership, clean architecture, and the intersection of great UX with reliable engineering. Currently obsessed with LLM tooling, prompt optimization, and making complex internal systems feel effortless to use.
- 🏦 Building ML infrastructure at one of the world's largest fintechs
- 🤖 Reduced operation setup time from 25 days → 5 hours with LLM automation
- 📈 Improved LLM agent prompt quality from 57% → 80% with a custom AI algorithm (GEPA)
- 🏛️ Staff member of Nubank's Front-End Engineering Guild
- 🌍 Open to international freelance opportunities
- 📍 Based in Brazil (UTC-3) · Fluent in English
Frontend
Backend
AI / ML
Tools
| Project | Stack | Description |
|---|---|---|
| clone-news | TypeScript · Next.js | Full-stack clone of tabnews.com.br — SSR, API routes, DB |
| react-audio-player-steroids | TypeScript · React | Mobile-friendly audio player with modern UI — open source fork |
| recipe-generator | TypeScript · Next.js | Web app to generate structured prescriptions for psychologists |
| qlocktwo-clone | TypeScript | Visual word clock — front-end creative project |
⚡ 25 days → 5 hours Operation setup time (LLM automation)
📈 57% → 80% LLM Agent prompt quality (GEPA algorithm)
👥 100+ agents Human labelers supported daily on the platform
🔁 +40% conversion New leads reaching active status
🚀 +22% productivity Operational output across labeling teams
Always building · Always learning · Open to interesting problems