julio cesar Valderrabano Henandez
@juliocesarvalderraba
I'm a junior data scientist building machine learning, predictive modeling, and computer vision solutions in Python.
MexicoWhat I'm looking for
I'm building end-to-end machine learning solutions as a freelance junior data scientist, preparing complex datasets with Python, Pandas, and NumPy for predictive models.
I've implemented classification and regression algorithms with Scikit-learn, using cross-validation and hyperparameter tuning to improve accuracy and ROC-AUC. I also communicate findings through visualizations in Matplotlib, Seaborn, and Jupyter Notebook.
My projects include detecting manipulated facial images with TensorFlow, estimating age ranges from facial images with CNNs, building e-commerce recommendation systems using semantic similarity, and predicting customer conversion and churn. My background in aeronautical and mechanical engineering brings rigorous analytical thinking to data-driven business problems.
Experience
Work history, roles, and key accomplishments
Científico de Datos Junior
Freelance
Aug 2025 - Present (1 year 1 month)
Desarrollé y preparé conjuntos de datos complejos utilizando Python, Pandas y NumPy, asegurando su calidad y consistencia para la aplicación en modelos predictivos de Machine Learning. Implementé y optimicé algoritmos de Machine Learning para clasificación y regresión con Scikit-learn, mejorando métricas de desempeño como accuracy y ROC-AUC mediante validación cruzada y ajuste de hiperparámetros.
Diseñador CAD
Freelance
Aug 2022 - Jun 2023 (10 months)
Gestioné múltiples proyectos freelance de forma remota, manteniendo altos estándares de calidad y cumplimiento de entregas, demostrando habilidades de organización y resolución de problemas. Fortalecí mis habilidades analíticas al transformar requerimientos complejos en soluciones técnicas estructuradas, lo que es fundamental para el análisis de datos y la resolución de problemas en ciencia de dat
Education
Degrees, certifications, and relevant coursework
TripleTen
Data Scientist Certificate, Data Science
2025 - 2026
Completed a Data Scientist Certificate program, covering data science and machine learning techniques.
Tech stack
Software and tools used professionally
Availability
Location
MexicoAuthorized to work in
Salary expectations
Skills
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