About Cristina
Data Scientist experienced in building machine learning models and data pipelines in Big Data environments. Skilled in Python, PySpark, Apache Spark and AWS to process large-scale datasets and generate actionable insights for business decision-making.
Spanish
Native or bilingual
English
Fluent
Can work on-site
Madrid (up to 50km)
Experience
- HylionData ScientistJanuary 2025 - Today (1 year and 5 months)Madrid, Spain
- Designed and implemented data ingestion pipelines from databases, APIs and structured files.
- Developed PySpark data pipelines for Big Data processing.
- Performed Exploratory Data Analysis (EDA) to identify patterns and data quality issues.
- Built machine learning models for predictive modeling, classification and regression using Scikit-learn and XGBoost.
- Applied feature engineering and cross-validation to optimize model performance.
- Improve model explainability using SHAP and Feature Importance.
- Deployed analytical solutions in AWS (S3, EC2, Lambda).
- Developed KPI dashboards (Power BI, Tableau) to support data driven decisions.
- Evolutio Empowering the Cloud / SeproTecIT Recruitment Consultant / Talent AnalyticsJanuary 2018 - January 2024 (6 years)Madrid, Spain
- Managed end-to-end recruitment processes for IT roles (cloud, networking, systems, data, cybersecurity).
- Partnered with hiring managers and stakeholders to define technical requirements and hiring strategies.
- Analyzed recruitment KPIs and hiring data (time-to-hire, conversion rates, turnover).
- Optimized talent pipelines and sourcing strategies to improve hiring efficiency.
- Produced analytical reports and insights to support talent acquisition decisions.
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Education
- Master in Data ScienceUniversidad UNED - KSchool2026Master in Data Science
- Master inUniversidad Europea Miguel de Cervantes2018Master in