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# Lead AI Engineer LLMs & Document Intelligence

- **Company:** Cori Clinical
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Audit Trail, Information Extraction, Machine Learning, Search Technologies, Software Engineering, Large Language Models, Information Technology, Data Pipelines
- **Published:** July 19, 2026
- **Apply:** https://www.jobleads.com/es/job/ec8d3ce27e3feff7afe764552adbc37bf

## About the Role

* Five or more years of professional engineering experience.
 * Strong computer science and software engineering fundamentals.
 * Hands-on experience building and deploying production LLM applications.
 * Experience with RAG, embeddings, vector search, reranking, structured extraction, evaluation and monitoring.
 * Evidence of taking products from initial concept to reliable production use.
 * Strong communication skills and the ability to work across technical and non-technical teams.
 * A track record of owning meaningful outcomes for real users.

A BSc in Computer Science, Software Engineering or a related field is preferred. An MSc in AI, Machine Learning or Data Science is valuable, but strong engineering ability matters more than the exact degree title.

Particularly relevant experience

Experience in any of the following would be a strong advantage:

 * Document intelligence, search or structured information extraction.
 * Complex PDFs, tables, forms, OCR and source-level citations.
 * Healthcare, life sciences, pharmaceuticals or another regulated industry.
 * Security, access controls, audit trails and data privacy.
 * LLM evaluation, red teaming and human-in-the-loop review.
 * High-growth startups or scale-ups.

How we work

High agency is essential.

You'll be expected to identify important problems, make progress through ambiguity and take responsibility for outcomes, not simply complete assigned tasks.

You'll be a strong fit if you:

 * Care deeply about the quality and impact of your work.
 * Move quickly without compromising safety or reliability.
 * Raise problems early and bring potential solutions.
 * Communicate clearly, collaborate well and operate with low ego.
 * Are intellectually curious, pragmatic and passionate about building useful products.
 * Take ownership from initial idea through to production and iteration.

## Description

We're looking for a Senior AI Engineer with excellent software engineering fundamentals to build reliable, production-grade AI products for complex, document-heavy workflows.

This is a hands-on role for someone who has taken LLM applications beyond prototypes and into production. You'll work across applied AI, backend engineering, data, evaluation and infrastructure, with significant ownership from architecture through to deployment and continuous improvement.

We care about new technology, but we care more about building products that are accurate, secure, useful and trusted.

What you'll do

 * Build and operate production applications using LLMs and related AI technologies.
 * Develop document ingestion, extraction, retrieval and question-answering systems.
 * Build and improve RAG, semantic search, reranking, tool use and agentic workflows.
 * Create evaluation systems covering retrieval quality, factuality and end-to-end performance.
 * Design for citations, traceability, auditability and appropriate human oversight.
 * Build the APIs, data pipelines and infrastructure needed to run AI products reliably at scale.
 * Monitor quality, latency, cost and reliability, and address hallucinations and regressions.
 * Work closely with product, regulatory and commercial teams to solve real customer problems.