Open to opportunities

lluis Cierco

@lluiscierco

Message

I build production machine learning systems that improve commercial decisions.

United Kingdom

Message

I've delivered commercial machine learning and analytics solutions at The Rank Group, Mars Inc, and Coca-Cola Europacific Partners. At The Rank Group, I improved customer retention by 15% with churn and customer-value models, built a 98% accurate LLM extraction pipeline, and owned deployment, monitoring, retraining, and experimentation.

I've also uncovered a 12% revenue growth opportunity at Mars, increased campaign conversion by 7% at Coca-Cola Europacific Partners, and automated workflows that saved over 15 hours weekly while reducing data errors by 80%.

Experience

Work history, roles, and key accomplishments

Current

Senior Data Scientist

Current

The Rank Group

Nov 2025 - Present (9 months)

Improved customer retention by 15% through a churn prediction solution and developed CLV models to optimize promotional spend. Built an LLM-based pipeline for extracting structured information from promotional communications, achieving 98% extraction accuracy.

Churn Modeling Customer Lifetime Value LLM MLOps Model Deployment Monitoring Experimentation Python SQL

Education

Degrees, certifications, and relevant coursework

Universitat Politecnica de Catalunya

Master's in Industrial Engineering, Industrial Engineering

Master's in Industrial Engineering with a thesis on an AI-driven solution for detecting corrupted prenatal ultrasound images using deep learning and computer vision, achieving over 90% accuracy.