Senior Data Scientist

PIXIE; España; A distancia; EUR 60.000 - 80.000; Jornada completa

Descripción de la vacante

A dynamic tech company is seeking an experienced Senior Data Scientist to lead the design, development, and deployment of advanced ML systems. This role, which is remote, requires expertise in Python and deep learning, with a focus on LLM-based applications. Candidates should have 5+ years of experience and strong mentoring abilities. The initial contract is for 6 months with potential extensions.

Formación

• 5+ years of experience in machine learning and AI.
• Expert in Python and data science libraries.
• Hands-on experience with PyTorch or TensorFlow.
• Proven experience with LLMs and prompt-based models.
• Experience in deploying ML models to production.

Responsabilidades

• Design, build, and deploy advanced ML models.
• Architect and implement deep learning pipelines.
• Lead and mentor junior data scientists.
• Apply MLOps practices for model monitoring.
• Collaborate with cross-functional teams.

Conocimientos

Python

Machine Learning

Deep Learning

MLOps

SQL

Prompt Engineering

Herramientas

PyTorch

TensorFlow

Git

Descripción del empleo

We are seeking an experienced Senior Data Scientist to lead the design, development, and deployment of advanced machine learning systems — including LLM-based applications — as part of a high-impact data-driven initiative. This role is ideal for someone with deep technical knowledge, experience with mentoring, and a strong grasp of production-level ML and MLOps practices.

About the Role

Title : Senior Data Scientist

Experience : 5+ years

Location : Spain (Remote)

Employment Type : Full-time (Contractual-basis)

Key Responsibilities

• Design, build, and deploy advanced ML models (regression, classification, NLP, etc.).
• Architect and implement deep learning pipelines using PyTorch and / or TensorFlow .
• Develop and fine-tune LLM-based applications (e.g., RAG pipelines, prompt engineering, embeddings).
• Lead and mentor junior data scientists and drive code quality and reuse.
• Apply MLOps practices : CI / CD for ML , model monitoring, reproducibility.
• Write basic SQL queries to support data processing and feature engineering.
• Collaborate cross-functionally with product, engineering, and data engineering teams.

Requirements

5+ years of experience in machine learning and AI.

Expert in Python , data science libraries, and deep learning frameworks.

Strong knowledge of regression, classification, optimization algorithms, and evaluation metrics.

Hands-on experience with PyTorch or TensorFlow (preferably both).

Proven experience working with LLMs and prompt-based models.

Experience in MLOps and deploying ML models to production.

Basic proficiency in SQL for querying structured data.

Proficient in using Git / GitHub for collaborative development.

Good to Have

Experience building or integrating AI agents using LangChain, AutoGen, or similar tools.

Knowledge or experience with reinforcement learning algorithms.

Ideally bi-lingual : Fluent English and Fluent Spanish

Location : Spain

Start : ASAP

Duration : Initially 6 months with extension

If this job description aligns with you - or someone who you know is qualified - please attach and send your resume to , with a good phone number and time to reach out to you for a quick conversation.

Best regards,

Brian Scott