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Alejandro Peñas BernardosAP

Alejandro Peñas Bernardos

Data Scientist & Pure Mathematician

€429/day
Segovia, ES
3-7 years

Average response time: 1 hour

About Alejandro

I’m a results‑driven Data Scientist and Machine Learning Strategist with a proven track record of delivering high‑impact, revenue‑boosting analytics solutions for clients across finance, healthcare, and non‑profits. As a self‑employed professional based in Spain, I’ve reduced data processing times by up to 90%, increased model accuracy above 98%, and automated reporting workflows that saved organizations tens of thousands of euros annually.

My expertise spans end‑to‑end data science: from designing robust ETL pipelines and building explainable ML models (Random Forest, XGBoost, SHAP interpretability) to deploying interactive dashboards and automated PowerPoint reports via Python and the OpenAI API. I thrive on turning messy, incomplete datasets into clear, actionable insights that drive strategic decisions and measurable ROI.

Clients choose me because I deliver value—not just code. Whether you need customer segmentation, predictive maintenance models, or custom data automation, I combine technical excellence with a business‑first mindset to ensure every project maximizes efficiency and profitability. Fluent in English and Spanish, I offer flexible remote engagement (except Tuesdays and Wednesdays) and invoice directly as a registered autónomo in Spain, simplifying contracting and compliance.

If you’re ready to transform your data into your company’s most valuable asset—and see returns that far exceed your investment—let’s connect.
  • Spanish

    Native or bilingual

  • English

    Native or bilingual

  • French

    Basic

Remote only
Primarily works remotely

Experience

  • INIZIA
    Data Scientist
    January 2024 - Today (2 years and 5 months)
    Strategic Projects Consultant Jan 2024 – Present

    Objective: Optimize data ingestion and analysis for various corporate clients.

    Strategy: Implemented automated ETL pipelines (reducing ingestion times by 85%) and automated the creation of dynamic charts for stakeholders in Excel and PowerPoint.

    Results: Automated customer segmentation, uncertainty analysis, and social impact evaluation, delivering precise and timely insights.
  • ALESA INFORMÁTICA S.L. & VitalFit
    Web Developer
    January 2020 - Today (6 years and 5 months)
    Objective: Enhance digital presence and improve data collection and analysis for key organizations.

    Strategy: Designed and maintained WordPress sites focused on UX/UI and SEO, and developed a web application (with a Python backend and REST API) that automates data collection and report generation.

    Results: Improved platform usability and efficiency, enabling data-driven decisions based on in-depth analysis and custom visualizations.
  • Banking
    Data Scientist
    October 2024 - November 2024 (1 month)
    Freelance Consultant – Executed through Inizia Oct 2024 – Nov 2024

    Objective: Integrate data from two incompatible sources and segment the customer portfolio into four distinct groups—eliminating the need to manually replicate the study for each segment.

    Strategy: Designed and implemented Python pipelines that automated the process, enabling unified analysis with just a few extra lines of code.

    Results: Reduced time and effort by 75%, ensuring consistent analysis and optimized customer segmentation for decision-making.

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Education

  • Double Degree in Mathematics & Computer Engineering
    University of Valladolid
    Double Degree in Mathematics & Computer Engineering
  • High School in Research and Excellence
    IES Andrés Laguna
    High School in Research and Excellence

Skill set

Categories