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Joel Fernández RománJF

Joel Fernández Román

Machine Learning Engineer | Desarrollador Python

330 €/día
Girona, ES
3-7 años

Tiempo medio de respuesta: 1h

Acerca de Joel

Trabajo exclusivamente en Python, programo a diario tanto en el trabajo como en proyectos personales, y considero que tengo un muy buen dominio del lenguaje. Tengo conocimientos en machine learning y análisis de datos, y he programado varios ETL.
  • Español

    Bilingüe o nativo

  • Catalán

    Bilingüe o nativo

  • Inglés

    Competencia profesional básica

Acepta trabajo presencial
Girona (hasta 50 km)

Experiencia

  • MiceLab (Universitat de Girona)
    Data Engineer
    SECTOR MÉDICO
    febrero de 2025 - Hoy (1 año y 4 meses)
    Girona, Spain
    • Library #1 — Research Toolkit: Led the end-to-end design and development of a modular Python toolkit that unified the group's workflows (preprocessing, visualization, reporting) into reusable, well-tested components.

    • Packaged and released with semantic versioning; authored an MkDocs documentation site (quickstarts, examples, contributing) to accelerate onboarding and enforce consistent practices across projects.


    • Library #2 — Data Extraction & Export Platform: Built a configurable export engine to ingest and transform heterogeneous clinical sources into a canonical schema modeled from domain logic.

    • Defined strict, end-to-end data models validated with Pandera (schemas, types, constraints), and replaced per-record Pydantic validation with vectorized DataFrame-level checks while downcasting column dtypes to the minimal required precision (e.g.,int8/16, float32, categorical), reducing memory by 95.4% and enabling safe refactors and reproducible outputs.

    • Implemented rigorous validation and cleaning (duplicate detection, out-of-range values, overlapping time windows) with deterministic transformations to deliver analysis-ready datasets and cross-project compatibility.

    • Developed a Streamlit dashboard on top of the export engine so non-technical users could parameterize outputs (fields, time ranges, filters, formats) and generate data packages consistently.
    Python Pandas Pydantic ETL Streamlit
  • MJN-NEURO
    Data Scientist
    SECTOR MÉDICO
    febrero de 2023 - julio de 2024 (1 año y 5 meses)
    Blanes, España
    • Software development in Python, focused on data analysis and training of artificial intelligence algorithms.

    • Developed a PyQt GUI application for the VISOR Project, handling real-time brain signal input from a wearable device. Designed asynchronous pipelines to process multi-device biomedical signals at high frequency in real time, ensuring reliability and robustness.

    • Algorithm developer in SERAS, focused on real-time evaluation and feature engineering.
    Python Numpy PyQt Pandas ETL

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Formación

  • Grado en Ingeniería, Ingeniería informática
    Universitat de Girona
    2023
    Grado en Ingeniería, Ingeniería informática

Conjunto de habilidades profesionales (15)

Categorías