I'm Leonnardo — full stack engineer from Brazil. I build products end to end: API, web panels, mobile and messaging — and put AI in production where it actually earns its place.
By day I ship platforms and live activations for Red Bull, Riot Games, Itaú, Bradesco and Coca-Cola. By night I run my own products — Zinta, a multi-tenant scheduling SaaS, and Houx, a lead engine for real estate — and go deep on RAG pipelines, MCP servers and agent guardrails, with golden sets to prove they hold up.
More at leonnardomarinho.dev