Full Stack Engineer (Python, React, AI/ML/LLM/SDK) – Cutting-Edge Series B scale up Location : Remote EU - Spain Salary : 70K Euros - 100K 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 Python, React, and modern AI/ML development, including LLM frameworks, SDKs, and retrieval-augmented generation (RAG) systems.Key Responsibilities Design and develop scalable full-stack solutions involving both frontend (React/TypeScript) and backend (Python/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 Qualifications Strong proficiency in Python and React/TypeScript;
experience with Java isa plus. Hands-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.