Overview As a Prompt Engineer in our AI Innovation Lab, you design, test, and scale prompts for large language models to improve decision-making, knowledge access, and collaboration. You will work with a multidisciplinary team to apply generative AI to human development, sustainability, and social well-being. You’ll build a reusable prompt framework, refine outputs for quality and ethics, and contribute to responsible AI practices. This role offers impactful, mission-driven work with cutting-edge tools and cross-functional collaboration. Compensaciones / Incentivos * 100% remote work flexibility within Spain * state-of-the-art AI tools and infrastructure * training opportunities in generative AI, ethics, and advanced prompt engineering * high-impact projects contributing to sustainability, education, healthcare, and transformation * culture of collaboration, continuous learning, and purpose-driven innovation Responsabilidades * Design, test, and refine prompts to maximize quality, accuracy, and ethical reliability of outputs * Build and maintain a prompt engineering framework with reusable templates, libraries, and guidelines * Collaborate with product, engineering,



and research teams to integrate AI into tools addressing social and business challenges * Apply advanced NLP techniques, embeddings, and fine-tuning to tailor LLMs to use cases * Implement metrics to evaluate model performance, bias, and inclusivity * Support development of AI systems aligned with organizational values, ethics, and social responsibility * Stay ahead of curve in prompt engineering, AI safety, and generative model capabilities Requisitos principales * Bachelor in Computer Science, Computational Linguistics, AI, or related discipline * Demonstrated experience designing prompts and workflows for LLMs (OpenAI, Anthropic, Google Gemini, Llama, etc.) * Solid Python programming with API experience * Strong understanding of NLP methods, embeddings, and vector databases (Pinecone, Weaviate, FAISS) * Familiarity with cloud platforms (AWS, Azure, GCP) * Ability to work cross-functionally and translate human needs into AI-powered solutions * Fluent in English (B2+) * Cross-functional collaboration * Strong communication * Problem solving * Prompt design for LLMs * NLP, embeddings, vector databases * Python programming

📌 Prompt Engineer – Generative AI (Barcelona)
🏢 Ethikos
📍 Barcelona