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# Data Scientist

- **Company:** Sanofi
- **Location:** Barcelona, Spain
- **Salary:** €70,800.0 - €94,400.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Airflow, Amazon Web Services, Computer Vision, Big Data, Code Review, Continuous Integration, Directed Acyclic Graph (Directed Graphs), Linux, Python (Programming Language), Machine Learning, Natural Language Processing, NumPy, Recommender Systems, Tensorflow, Pytorch, Large Language Models, Deep Learning, Web Content, Keras, Git, Fastapi, Pandas, Matplotlib, Scikit Learn, Kubernetes, Information Technology, Apache Kafka, Multiaccess Edge Computing, Docker
- **Published:** July 17, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

Bachelor's degree in a quantitative field such as Computer Science, Mathematics, Physics, Engineering, or similar.
3+ years of industry experience applying machine learning techniques.
Strong technical skills in Python and core ML libraries (pandas, numpy, scikit-learn, TensorFlow/Keras or PyTorch, matplotlib, seaborn, FastAPI).
Proven experience in end-to-end data science project execution - from ideation and planning to implementation, evaluation, and delivery.
Strong theoretical and practical understanding of Machine Learning and statistics.
Hands-on, resourceful, self-motivated, and creative attitude.
Nice to have:
Experience with Airflow DAGs, Apache Kafka, AWS, Docker, Kubernetes, Linux, Git, and CI/CD pipelines.
Familiarity with managing and processing large datasets.
Hands-on experience with Deep Learning, deploying RAGs and agentic workflows in production.
Understanding of production best practices: code reviews, testing, documentation, and long-term maintenance.
Master's Degree in a relevant field is a plus.

## Description

The Hotels Network has joined Lighthouse! And we are expanding internationally. As a Data Scientist at The Hotels Network, you will develop and implement cutting-edge Machine Learning (ML) and Artificial Intelligence (AI) techniques that power our market-leading products. You'll work across a wide range of ML/AI domains, including user behavior prediction, NLP, LLMs, computer vision, time-series forecasting, and causal inference. Your work will directly influence key product features used by tens of thousands of hotels and millions of travelers around the world.
Examples of projects you'll work on include:
Oraculo Product - Build predictive systems to forecast user behavior, enabling personalized experiences and boosting hotel engagement and conversion.
AI-Driven Web Content Analysis - Leverage NLP to analyze content across 20,000+ hotel websites, providing actionable insights to optimize the user journey.
AI-Powered Personalization Tools - Use LLMs to launch recommendation engines that automatically configure personalized web tools for each property, maximizing direct booking effectiveness.
Where you will have impact
Your contributions will have a direct impact on the growth and results of The Hotels Network. By applying your machine learning expertise, you'll enhance the personalization and performance of our platform, driving value for thousands of hotels globally. Your work will influence product decisions, improve customer experiences, and shape the future direction of our data-driven innovations.
About our team
Our Data Science team is at the core of our innovation. We combine deep technical expertise with real-world impact to deliver AI-powered products that lead the market in personalization and performance. With access to a unique dataset of millions of daily user sessions across 20,000+ hotel websites, we develop high-value innovations in ML/AI domains including:
User behavior prediction
NLP
LLMs, RAGs, and agentic workflows
Recommenders
Computer vision
Time series forecasting
Causal inference
We are a collaborative, ambitious, and creative team, eager to develop solutions that make a tangible difference for our clients.


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