guide
Hi, I'm João. Ask me about my work by text or voice, or let me walk you through the portfolio myself.
Projects
These are the projects I want people to judge me by: what they do, what I built, the tradeoffs I made, and the stack behind them.
A local-first voice assistant that combines wake word, STT, LangGraph tools, RAG memory, TTS, and private mesh architecture.
A deep AI systems project: voice UX, local privacy, tool orchestration, service contracts, RAG, model-provider flexibility, and distributed mesh architecture all visible in one codebase.
An encrypted communication system where Rust-owned security boundaries, content-blind relays, device state, retention, and UX honesty are visible product states.
A deep security/distributed-systems artifact that demonstrates protocol-aware frontend work, product honesty, and systems engineering beyond a standard UI build.
A Linux toolkit that isolates AI coding agents, credentials, browser sessions, editor state, and project files with Distrobox and LUKS.
A concrete AI-security tooling project: each agent context gets its own encrypted storage, browser profile, editor state, SSH identity, and filesystem boundary.
A shipped professional-services website for a law firm, built for credibility, clarity, and search visibility.
A shipped frontend example showing client delivery, visual polish, SEO basics, and business-facing information architecture.
A tattoo booking and studio-management product with a Next.js frontend and Go/Supabase API.
A product-engineering example covering fullstack CRUD, marketplace modeling, booking UX, and frontend/backend integration.
A Docker-first Django/Next.js microservices platform running the daily operations of the ILB business incubator.
A production-shaped strict-microservices system that boots locally with one make command, seeds deterministic demo data, and passes a host-side gate spanning Ruff, ESLint, TypeScript, Vitest, per-service pytest, and Playwright smoke tests through the real gateway.
A research neurofeedback system that turns OpenBCI EEG beta activity into a real-time Pygame aircraft feedback loop through Lab Streaming Layer.
A concrete brain-computer interaction artifact: EEG acquisition, signal processing, asynchronous data transport, and an interactive neurofeedback game connected into one reproducible research software loop.
Voice guide
guide
Hi, I'm João. Ask me about my work by text or voice, or let me walk you through the portfolio myself.