Freelancer profile translated to English.

Description

Data scientist with experience in companies such as eBay, BBVA, Barclays, Santander, Boston Consulting Group, and Perkin Elmer, both in Spain and abroad.

Although based in Madrid, he studied mathematics and statistics at the University of Zaragoza and Washington University in St. Louis, USA.

He began working as a freelancer in 2005 and has worked with large and small data since then. He is an active member of the R user community and was the first president of the R user association (Comunidad R Hispano) after its founding in 2011. However, for the last five years, he has been working regularly with Python.

He is a technology enthusiast and has hands-on experience with data science tools such as databases (relational and non-relational), cloud services (GCP, Azure, AWS, and others), AI (particularly LLMs), and, of course, the usual productivity tools (git, etc.).

Industry field of expertise

Languages

English
Fluent
Spanish
Native or bilingual

Workplace preferences

Can work on-site

Madrid (up to 50km), Madrid (up to km)

Rosenthal Research
AI Consultant
DIGITAL AND IT
February 2026 - March 2026 (1 month)
Barcelona, Spain
The Challenge:The client’s team was bogged down by complex, manual review of incoming proposals across various languages and formats (PDFs, spreadsheets, emails). This high-overhead process delayed decision-making and diverted talent from high-value strategy.

The Solution:I engineered a semi-autonomous agent leveraging LLMs to ingest, translate, and evaluate heterogeneous data. The system generated rich, actionable reports with citations, allowing human reviewers to verify and finalize decisions in a fraction of the time.

The Impact:Automated over 200+ man-hours monthly and standardized the evaluation criteria across global offices.
LLM Python
SandboxAQ
Data scientist
PHARMACEUTICALS INDUSTRY
May 2022 - September 2024 (2 years and 4 months)
Washington, United States
Large-scale prediction project of medical device demand, its needs, and distribution.
Machine Learning Logistics Python Time Series Predictive Models
B2Marketplace
Data scientist
E-COMMERCE
May 2020 - May 2024 (4 years)
Optimization of bids in marketplaces (Amazon, etc.). Creation of predictive models to determine the optimal bidding level based on historical clicks and conversions.
Data science Predictive Models