**Job description** ------------------- **Location:** Full Remote **Seniority:** Senior **Languajes:** English context mandatory. Spanish **Service context:** International project with an agile, multidisciplinary, and distributed team dedicated to scaling AI assets and developing innovative Retrieval\-Augmented Generation (RAG) products and Document Understanding solutions. The service provider will contribute at the intersection of cutting\-edge LLMs, agentic architectures, and application development, delivering intuitive and responsive frontend interfaces using React and collaborating with cross\-functional teams to build AI\-powered applications. **Job requirements** -------------------- Expertise: Proven expertise in full stack development with React (frontend). Strong expertise of Large Language Models (LLMs), Retrieval\-Augmented Generation (RAG), and related AI/ML concepts. Ability to design scalable, reliable, and maintainable software solutions. Other Qualifications: Autonomous, willing to learn, problem solving, capacity to explain and present to stakeholders Technical Expertise : REACT.js \| Node.js \| Docker \| LangChain \| Cloud: Amazon, Azure \| LLMs \| RAG . \| Python \| English mandatory \| Agile methodology Preferred technical skills: Hands\-on expertise with LangChain Familiarity with AI model deployment and optimization. Remote* Madrid, Comunidad de Madrid, Spain