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AI Engineer – LLMs & Document Intelligence
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About the role

We are looking for an
AI Engineer
to join a new
Document Intelligence team
within an international technology environment.

In this role, you will design, build, evaluate, and improve
AI-powered document processing solutions
used across a large international group.

You will work with
LLMs, vision-language models, OCR, multimodal AI, NLP, and deterministic approaches
to extract, classify, validate, and transform complex unstructured and semi-structured business documents into reliable structured data.

This is a highly hands-on role at the intersection of
AI Engineering, Software Engineering, NLP, Document Intelligence, and production systems
.

You will collaborate closely with Product, Data Scientists, AI Engineers, Data Engineers, Platform teams, and business stakeholders to assess technical feasibility, choose the right approach for each use case, and build scalable solutions that can move confidently into production.

If you enjoy working with
Python, LLMs, OCR, multimodal models, structured outputs,



evaluation frameworks, APIs, and real-world unstructured data
, this could be a great fit.

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What you’ll do

? Design, build, and evaluate document processing pipelines for extraction, classification, validation, and transformation

? Develop and optimise prompts, structured outputs, validation logic, and post-processing components

? Evaluate and combine
LLMs, multimodal models, OCR, VLMs, NLP techniques, and deterministic approaches
depending on the problem

? Work with complex document formats, including multi-page documents, tables, line items, and inconsistent layouts

? Build reusable AI capabilities that can be applied across multiple document types and business use cases

? Create representative evaluation datasets and reliable ground-truth labels

? Develop automated evaluation frameworks and regression tests to protect performance when pipelines or model versions change

? Analyse model an

📌 AI Engineer – LLMs (Barcelona)
🏢 Capitole
📍 Barcelona