Job Summary: IndraMind is seeking an AI Engineer for knowledge modeling, responsible for designing and developing ontologies, performing semantic modeling, and ensuring semantic interoperability in AI projects. Key Responsibilities: 1. Design and develop domain ontologies and upper ontologies 2. Promote semantic interoperability 3. Apply ontologies in artificial intelligence use cases Location: Madrid, ES Professional Profile: Engineering D&S, Mobility and ATM Required Experience: More than 2 years of experience Work Modality: Hybrid **IndraMind** is Indra Group’s technological initiative developing sovereign AI within a cyber-resilient environment to ensure comprehensive protection of our citizens, territories, and physical and digital critical infrastructure and assets. At **IndraMind**, we know talent is the key to driving change and building a safer digital future. If you are ready to face new challenges, grow professionally, and contribute your expertise to projects that truly make a difference, this is the place for you. **Join our IndraMind team!** As part of our positioning as a leading company, we aim to strengthen our team with an **AI Engineer for knowledge modeling.** What will you do? * Design and develop **domain ontologies and upper ontologies** in defense and critical systems environments. * Perform semantic modeling of entities, relationships, events, threats, actors, and capabilities. * Define and maintain shared **vocabularies, taxonomies, and knowledge models** across systems. * Carry out **ontological alignment, fusion, and mapping** across diverse data sources and models. * Promote **semantic interoperability**, ensuring consistency in the meaning of information. * Apply ontologies in **artificial intelligence** use cases, including automated reasoning, pattern detection, and automation. * Collaborate with data, AI, architecture, and interoperability teams to integrate semantic models into real-world solutions. * Document and maintain knowledge models, guaranteeing their traceability and evolution. What are we looking for in you? * At least 3–4 years of demonstrable experience in **ontology design** or knowledge representation. * Solid knowledge of semantic technologies such as **OWL**, **RDF**, and SPARQL. * Knowledge of **semantic modeling**, taxonomies, metadata, and complex information structures. * Experience in **semantic alignment and integration** across heterogeneous systems. * Familiarity with standards such as W3C, SKOS, SHACL, or upper ontology models. * Interest or experience in applications of **AI, automated reasoning, or knowledge graphs**. Madrid. Hybrid **What we offer you** * **Stability and Future ✨:** Long-term projects at a leading company with **more than 50,000 professionals**, backed by financial security. * **Innovative and High-Impact Projects:** You will work with cutting-edge technologies, delivering impact both nationally and internationally. * **Close and Transparent Environment:** You will enjoy direct and fluid communication with managers and colleagues in a collaborative and open setting. * **Autonomy and Flexibility:** You will have the freedom to organize your work, with genuine work-life balance adapted to your pace. * **Personalized Career Plan:** Designed to accelerate your professional growth and development. * **Continuous Training:** via Open University and Udemy for Business (over 6,000 courses to specialize!). * **Exclusive Well-being Discounts:** Enjoy benefits at gyms, restaurants, stores, leisure, and more as an Indra employee. * **Competitive Compensation** and **flexible compensation plans** tailored to your needs. **What does our selection process look like?** * Profile Review: We assess your experience and skills to determine whether you match our requirements. * Initial Contact (5–10 min): If you receive a call from an unknown number, it’s our team! A brief conversation to get to know you and answer any questions. * Technical Interview: You’ll meet the team, who will explain the project and daily tasks. We’ll also explore your technical knowledge. Additionally, brief psychological and English competency assessments may be conducted (if required). * Talent Attraction Team Interview: We want you to learn more about us as a company—our values, career model, skills—so both you and the team can evaluate mutual fit. * Offer and Onboarding: If everything goes well, you’ll join our team and begin this new chapter together! **IndraMind, Protecting to empower** *Our commitment is to foster workplaces where people are treated with respect and dignity, supporting staff’s professional development and guaranteeing equal opportunities in recruitment, training, and promotion, while providing a workplace free from any discrimination based on gender, age, disability, sexual orientation, gender identity or expression, religion, ethnicity, marital status, or any other personal or social circumstance.*