Senior ML/LLM Engineer (API & Fullstack) - English Mandatory

barcelona, cataluña, Spain • Posted June 09, 2026

Job Type: Full-time
Location: barcelona, cataluña
Posted: June 09, 2026
Category: Informática y tecnología
Application Deadline: July 19, 2026

Role Description

  • Full-time

Job Description

This role is for a Senior ML/LLM Engineer with strong data science capabilities and a significant focus on API development and full-stack engineering principles . They will be responsible for the end-to-end lifecycle of machine learning solutions, from model conception and development to building robust, scalable APIs and integrating them into production applications.

Qualifications

  • Statistical Models & Machine Learning: Develop, test, and validate statistical and machine learning models in Python. Explore, select, and prepare datasets, including feature engineering using libraries like NumPy , Pandas , Polars , and SciPy .
  • Advanced ML Libraries: Develop and implement classification, regression, and other predictive models leveraging libraries such as Scikit-learn , XGBoost , LightGBM , CatBoost, and deep learning framew...

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