Senior AI Engineer at lexroomlexroom · Barcelona

Workplace: Remote, Hybrid

Type: fulltime

Posted: 2026-10-22

Skills: PythonLexroom http://Lexroom.ai is building the AI platform where legal work gets done. In just over two years, we've grown from zero to €25M ARR, and today more than 20,000 legal professionals across Italy, Spain, Germany, France, and Bulgaria rely on Lexroom http://Lexroom.ai. We're backed by $73M from Left Lane Capital, Base10 Partners, and Eurazeo, and we're a team of around 300 builders who move fast, say things straight, and own each outcome. Our next goal? Become Europe's most-used legal product. WHY LEXROOM http://Lexroom.ai? - Shape the Standard: Be part of the team setting the benchmark for legal AI in Europe. - Work with the Best: Collaborate with exceptional colleagues in a culture that values competence, curiosity, and ambition. - Deliver Meaningful Results: Your contribution will directly influence how legal professionals work—faster, clearer, and more efficiently. At Lexroom http://Lexroom.ai, we leave buzzwords behind. Here, you’ll build something that lasts: a trusted platform, a strong reputation, a new standard for the legal world. WHAT YOU'LL DO - 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 documents. - Run end-to-end evaluations to pinpoint bottlenecks, measure performance, and guide continuous improvements. - Work closely with legal experts to design evaluation protocols and build reliable, domain-specific datasets that strengthen every layer of the stack. - Maintain technical excellence by following established best practices, coding standards, and rigorous code-review processes. WHAT YOU’LL BRING - Proven expertise in building and managing robust ML pipelines. - Strong Python skills w…Sign in to see the original postingBrowse more developer jobs on RoleBurst