Full Stack Engineer (Python, React, AI/ML/LLM/SDK) – Cutting-Edge Series B scale up

Location: Remote EU - Spain

Salary: 70K Euros - 100K Euros

About:

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 is a 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 engineer

What 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.