I'm a senior backend engineer with 15+ years building production Ruby on Rails systems β especially billing, payments, and data pipelines, where being silently wrong gets expensive. At GitHub, I helped ship billing infrastructure for Copilot. I'm Rails-first, pragmatic about Go where it fits, and currently exploring how agentic engineering workflows can improve real production software development.
- Deepening my Go and distributed systems experience to complement my Rails work
- Testing AI coding agents against real production workflows and keeping notes on what holds up
- Exploring AI product evals: measuring usefulness, reliability, and failure modes
- π Trust is the foundation: teams work when people feel safe
- π Self expression matters β that's why I love emojis
I train jiu jitsu π₯ and study markets π.
- π« fuentesjr@duck.com
- π linkedin.com/in/fuentesjr



