I'm Head of Engineering at Oak Network (remote, global), based in Brazil (GMT-3). Over 18+ years I've moved from hands-on full-stack and blockchain engineering into technical leadership, and today I focus on AI engineering: designing agentic systems, multi-agent orchestration, and LLM-powered tooling that make both products and engineering teams faster. I build in the open and care about systems that hold up in production.
- ai-workflow — a full-SDLC toolkit (skills, agents, conventions) that makes AI coding assistants like Claude Code, Cursor, and Codex follow a repeatable engineering process.
- ecies-bls12381 — Go package for ECIES keypair generation, encryption, and decryption over the BLS12-381 curve.
- rfirewall — a user-centric firewall for Linux, written in Rust.
AI Engineering
- Agentic systems, autonomous workflows, multi-agent orchestration
- LLM-powered tooling and AI-assisted development
- Applying AI to engineering velocity, not just product features
Leadership
- Global engineering ownership: roadmap, architecture, delivery
- RFCs and PRDs, team building, mentorship
Engineering
- Languages: Go, Rust, TypeScript, Node.js (Nest.js), Next.js
- Distributed systems, API and SDK design, AWS, CI/CD
- Blockchain: EVM/Solidity, Solana, protocol design
Security (a background that shapes how I design, not my day job)
- CEH, ethical hacking, threat modeling, secure system design
- I publish independent research separately as 0xrafasec: CVE deep-dives, malware analysis, and blockchain security.
Conversations about AI engineering, technical leadership, systems architecture, and hard problems at the intersection of AI and production infrastructure.
Portuguese (native), English (professional).