Backend & Platform Engineer | Domain-Driven Design | AI Infrastructure 17+ years shipping production systems — APIs, fintech, healthcare, IoT/telematics, event-driven architectures
Based in Colima, México. I design systems around clear domain boundaries, explicit contracts, and boring infrastructure. I'd rather ship a reliable API than a clever one.
🛠️ Currently — Senior Software Engineer (consultant) at Encontrack: Rust real-time device communications for a 200k+ vehicle fleet-tracking platform, plus a Rails inventory system and a React Native + Node product.
📝 I write about architecture, technical decisions, and AI experiments at notdefined.dev · CV
| Project | What it is | Stack | Links |
|---|---|---|---|
| Dojo | Daily practice against vibe coding — pick a kata, no AI, honest feedback from an LLM sensei | TypeScript · React · Hono · PostgreSQL | repo · live |
| Drawhaus | Self-hosted Excalidraw alternative with real-time collaboration | TypeScript · React · Express · PostgreSQL | repo · live |
| Stockerly | Open-source fintech — DDD with 6 bounded contexts, multi-provider market data gateway | Ruby · Rails · Hotwire · PostgreSQL | repo · live |
| Mi Feria | Cycle-aware personal finance, mobile-first — your month doesn't start on the 1st | TypeScript · React Native · Expo · Firebase | repo · live |
→ Writeups and more at notdefined.dev/projects
- Domain-Driven Design (functional and tactical) with hexagonal architecture and explicit contracts
- Event-driven systems — bounded contexts, railway-oriented flows, circuit breakers, rate limiting
- Rust in production — real-time device communications at IoT scale (200k+ vehicles)
- AI infrastructure, not just usage — Dojo's LLM sensei and Stockerly's multi-provider gateway; also built SheLLM (unified LLM REST API) and KenoBot (cognitive-memory assistant)
- Quality discipline — CI gates, self-hosted SonarQube, e2e tests, security scanning
- Self-hosted infra — Kamal on Hetzner, Cloudflare Tunnel, Tailscale
"Any sufficiently advanced bug is indistinguishable from a feature."