Our client is on a mission to harness the power of Artificial Intelligence for social impact.
¿We are looking for a passionate Prompt Engineer to join their AI Innovation Lab.
As Prompt Engineer, you will design, optimize, and scale interactions with large language models (LLMs) to deliver solutions that improve decision-making, knowledge access, and collaboration.
You will work in a multidisciplinary team of data scientists, software engineers, and domain experts, contributing to projects where AI is applied to human development, sustainability, and social well-being.Key ResponsibilitiesDesign, test, and refine prompts to maximize the quality, accuracy, and ethical reliability of generative AI 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 that address social and business challenges.Implement metrics to evaluate model performance, bias, and inclusivity.Support the development of AI systems aligned with organizational values,



ethical standards, and social responsibility principles.Stay ahead of the curve in prompt engineering, AI safety, and generative model capabilities.RequirementsBachelor’s or Master’s degree in Computer Science, Computational Linguistics, AI, or related discipline.Demonstrated experience designing prompts and workflows for LLMs (OpenAI, Anthropic, Google Gemini, Llama, etc.).Solid programming skills in Python, with hands-on experience working with APIs.Strong understanding of NLP methods, embeddings, and vector databases (e.g., Familiarity with cloud platforms (AWS, Azure, GCP).Fluent in English (B2+).Nice to HaveExperience with LangChain, RAG pipelines, or MLOps frameworks (Docker, MLflow, Kubeflow).Knowledge of AI ethics, bias mitigation, and responsible AI deployment.Background in applied research or social innovation projects.We OfferCompetitive gross annual salary 100% remote work flexibility wit

📌 Prompt engineers (Barcelona)
🏢 Ethikos
📍 Barcelona