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# AI Data Scientist

- **Company:** Ai-powered
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Microsoft Azure, Python (Programming Language), Machine Learning, Large Language Models, Prompt Engineering, AI Platforms
- **Published:** September 1, 2026
- **Apply:** https://www.jobleads.com/es/job/e618cde4ad8577c93327f27003b87512b

## About the Role

* 3+ years in data science, machine learning or applied AI.
 * Hands-on experience with LLMs, prompt engineering and experimentation.
 * Strong NLP/ML fundamentals and the judgement to know when classical methods outperform LLMs.
 * Solid statistics - enough to judge whether a performance change is real.
 * Experience with unstructured or semi-structured documents.
 * Python skills that make your work reproducible and easy for engineers to productionise.
 * Ability to explain technical trade-offs clearly.
 * Comfortable diving into business domains to understand what "correct extraction" actually means.

## Description

* Develop and optimise prompts, structured outputs, validation logic and post-processing components.
 * Compare LLMs, multimodal models, OCR and deterministic approaches to select the right solution for each use case.
 * Build representative datasets, define ground truth and establish robust evaluation metrics.
 * Run experiments, analyse failure patterns and iterate to improve accuracy and reliability.
 * Create reproducible Python workflows and contribute reusable components for extraction, validation and data prep.
 * Collaborate with Product, AI Engineering and business teams to translate requirements into measurable data science problems.
 * Communicate findings clearly to both technical and non-technical audiences.


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