Full Stack Engineer (Java, React, AI/ML/LLM/SDK) Cutting-Edge Series B scale upLocation: Remote EU - SpainSalary: 75K Euros - 110K EurosAbout:We are seeking a Full Stack Engineer with a proven track record in building and scaling applications powered by Large Language Models (LLMs). This role requires deep expertise in Java, React, and modern AI/ML development, including LLM frameworks, SDKs, and retrieval-augmented generation (RAG) systems.Key ResponsibilitiesDesign and develop scalable full-stack solutions involving both frontend (React/TypeScript) and backend (Java).Build and optimize AI/ML pipelines leveraging LLMs and RAG architectures.Develop SDKs and APIs to support AI-driven applications in resource-constrained or production-grade environments.Collaborate across engineering, product, and research teams to drive innovation in AI/ML-based products.Ensure high performance, testability, and reliability across the stack.Key QualificationsStrong proficiency in Java and React/TypeScriptHands-on experience building and deploying LLM-based systems (e.g., OpenAI, Hugging Face Transformers, LangChain, etc.).Deep understanding of AI application architecture, including RAG systems, vector databases, prompt engineering, and fine-tuning.Experience with ML model serving, SDK development, and working in production-grade environments.Ability to work across the full stack and thrive in a fast-paced, collaborative environment.Product-focused engineerWhat We Offer:The chance to work with cutting-edge hardware technologies in a high-growth environment.A collaborative team culture that values innovation and technical excellence.Competitive salary and benefits package.