Senior AI Engineer (BCN) is open at Lexroom in Barcelona (hybrid). The posting gives a salary of €70K - €100K. Posted on Oct 22, 2026, and still on Lexroom’s careers page when we last checked, on Nov 15, 2026.
About the role
Design and build agent-driven and RAG-based AI systems to solve complex legal tasks with precision and efficiency. - Fine-tune and post-train LLMs using cutting-edge supervised and reinforcement learning techniques to raise response quality. - Develop and optimize large-scale search pipelines for LLM-powered agents. - Implement and refine NLP algorithms to extract, structure, and validate information from legal…
The opening lines of the posting. The rest is on Lexroom’s careers page.
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