Selected work

Five systems, written up the way I'd explain them to another engineer: what the problem actually was, what I chose, and what it cost.

• 2024 — present

  Xanadu Fleet

  Inspections that survive with no signal

  A fleet inspection, fueling and maintenance system for a transport company: versioned checklists filled in on the roadside with no connectivity, records that are superseded rather than edited, and a signed evidence chain anchored to write-once storage.

  Built with: Go, PostgreSQL, htmx, PWA, S3 Object Lock (WORM), Ed25519, Goose, GitHub Actions, MagaLU Cloud

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• 2024 — present

  Smart-city platform

  A city's cameras and sensors, in one place, in real time

  My day job at Metropolys. Go services that ingest plate reads, face matches, transit feeds, traffic and weather telemetry, and the parts of the web product where operators search a plate, follow a vehicle across the city and receive watchlist alerts.

  Built with: Go, TypeScript, React 19, PostgreSQL / PostGIS, Redis, MQTT, WebSocket, Kubernetes, Prometheus

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• 2026 — present

  Manutenção Lavoura

  A maintenance logbook that fits in one binary

  Farm-equipment maintenance for two people — an agronomist and a farm manager — recorded on a phone in the field, often without signal. One Go binary and one SQLite file on a small server, with an offline outbox and a photo queue that never hold a record back.

  Built with: Go, SQLite, htmx, PWA, Caddy, systemd, GitHub Actions

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• 2025

  Mini Estufa

  A greenhouse that reports on itself, from ADC pin to browser

  My capstone project. I soldered the sensors, calibrated the readings, wrote the Go API that broadcasts them over WebSocket, and built the React dashboard that draws them — the full path from a voltage to a chart.

  Built with: Go, gorilla/websocket, React 19, Vite, Tailwind, Recharts, Supabase, MQTT, ESP32

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• 2025 — 2026

  Xanadu Transportes

  A haulage company's first website

  A transport company whose customers found it by phone number alone. A single prerendered page that loads fast on a truck-stop connection, puts a WhatsApp conversation one tap away, and only loads analytics after the visitor consents.

  Built with: Next.js 15, React 19, Framer Motion, Cloudinary, Google Analytics 4, Vercel

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