Senior Python Software Engineer · AI-Native
Python · Node.js · AWS · DDD · Microservices
13+ years building full-stack systems that can't fail — transaction platforms serving millions, real-time telemetry dashboards, and production AI agents, designed, shipped, and operated end to end.
I build AI systems for a living — guardrails, evals, cost control, self-hosting. libreai.dev is that work made open: the tools I wish existed, and the explanations I wish I'd had. Ecuadorian background, which is why Spanish and LatAm come first.
Get in touch →Architects agentic systems in Python/LangChain. RAG and eval suites wired into CI; LLM cost cut 5–10× through model cascading, prompt caching, and context trimming; guardrails, prompt-injection and PII defenses, and gated human review.
Python · LangChain · RAG · Evals · AWS · PostgreSQL · React
Led an event-driven document-intake pipeline using fine-tuned computer vision and OCR alongside LLMs, orchestrated with Kafka and Camunda, with a React underwriter UI.
Python · Kafka · Camunda · AWS · React · Computer Vision · OCR · LLMs
Built and operated self-checkout platform services serving millions of transactions across the US, Mexico, and Canada.
Python · Big Data · AWS · REST · Microservices · Event-driven architecture
Owned real-time telemetry dashboards in React and D3 over millions of records, on Node.js and Python microservices behind a GraphQL gateway.
Python · Node.js · GraphQL · Microservices · React · D3
Java · Scala · Spark · GraphQL · AWS
Java · Spring · Node.js · React · Kafka · AWS · Docker · K8s
Java · Spring · PHP · MySQL · SOAP