FOUNDER OF LIBREAI.DEV

Xavi Ramirez

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.

+1 786 562 0805xavier@libreai.devlinkedin.com/in/xaviramirezcomgithub.com/xaviramirezcomRemote — Miami, FL
Xavi Ramirez
WHY LIBREAI.DEV

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 →
EXPERIENCE
2025.09 → PRESENT
Dreamcode.io
AI-Native Software Engineer

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

2023.01 → 2025.09
Guidewire Software
Senior Software Engineer, Submission Intake

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

2021.09 → 2022.12
Walmart
Senior Software Engineer

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

2018.01 → 2021.07
ScienceLogic
Senior Software Engineer

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

EARLIER EXPERIENCE
2017 → 2018
DNSFilter
Senior Software Engineer

Java · Scala · Spark · GraphQL · AWS

2014 → 2017
LatAm Autos
Software Architect — led 30 developers

Java · Spring · Node.js · React · Kafka · AWS · Docker · K8s

2010 → 2014
Banking & insurance platforms
Software Engineer

Java · Spring · PHP · MySQL · SOAP

TECHNICAL SKILLS
LANGUAGESPython · JavaScript/TypeScript · Java · Kotlin · SQL
FRAMEWORKSFastAPI · Node.js · Spring Boot · React · D3 · GraphQL
AI / MLLangChain · RAG · evals · guardrails · fine-tuning · OCR & computer vision · open-weight models
CLOUDAWS · Docker · Kubernetes · Kafka · PostgreSQL · CI/CD
ARCHITECTUREDDD · microservices · event-driven systems · Camunda orchestration
LEADERSHIPTeam leadership up to 30 engineers · mentoring · technical workshops
EDUCATION & CERTIFICATIONS
2005 → 2011
B.Sc. Computer Science
ESPE — Ecuador
2016
Certified ScrumMaster & CSPO
Scrum Alliance