I build software at BTG Pactual.
Outside work, I make things in Rust, Zig,
and whatever the project calls for.
A multiplayer chess server you play from your terminal. Matchmaking, persistent game history, and games against Zander — all over SSH.
ssh -p 2222 chess.rafaelcl.com
A self-hosted cinema with synchronized playback, HLS video preparation, subtitles, and per-user access. Built with a Rust backend and a React frontend.
A chess engine with neural network evaluation and parallel search. Differential tests compare the Zig implementation with a pinned Stockfish reference.
Analyst · Jan 2026 — Present
IT Assistant · Mar — Dec 2025
C#/.NET services and React portals for the Risco Sacado team, supporting receivables financing operations in Brazil.
Software Development Intern
The startup’s sole developer. Automated JSON specifications for customizable furniture, including dimensions and drilling patterns.
Summer Intern
A .NET logging library to standardize the team’s logs, integrated into an Azure CI pipeline.
I enjoy working across the stack, with a particular interest in backend development.
I use AI as part of my development workflow. My personal projects give me room to explore systems programming, build tools I want to use, and run them on my own infrastructure.
Computer Engineering
Insper · 2021–2025
Portuguese · Native
English · Advanced