Xavier
Mareca

Data & AI Consultant

I help mid-size European companies turn their data into intelligent systems — combining modern BI, LLM applications, and cloud automation.

LinkedIn GitHub Contact Microsoft Learn

Current focus

AWS Machine Learning Engineer In progress

Work

Selected projects

AI-Powered BI Assistant

Natural language querying over structured data. 86 integration tests passing.

v1.0.0 — production ready
LangChain RAG Claude FastAPI ChromaDB

HR RAG Assistant

Multi-turn conversational assistant over HR policies and employee data.

Conversational memory · CI/CD
LangChain ChromaDB Claude FastAPI GitHub Actions

Tech stack

BI

Power BI
Microsoft Fabric
DAX

AI & Agents

CrewAI
LangChain
Anthropic Claude
RAG
Ollama

Data

PySpark
Delta Lake
Databricks
SQL
Python

Cloud

Azure
AWS
FastAPI