Position Summary: We are seeking a Senior RF and Tactical Networks Engineer to design, develop, and integrate advanced communication systems in demanding operational environments. Key Highlights: 1. Participation in strategic tactical communications projects. 2. Development of cutting-edge technological solutions in Defense and Security. 3. Collaboration with highly specialized engineering teams. **Location:** Madrid, MD, ES **Professional Domain:** Defense and Security **Required Experience:** Over 2 years of experience **Work Modality:** Hybrid At Indra Group, we protect what matters most. We lead the development of cutting-edge technological solutions that strengthen national and international security. **Join our team on strategic tactical communications projects!** As part of our positioning as a leading company in the defense sector, we seek to incorporate a **Senior RF \& Tactical Networks Engineer**, to participate in the **SIAGEN CTN project**, contributing to the design, development, and integration of advanced embedded communication systems in demanding operational environments. What will you do? * Design, develop, and integrate **embedded tactical radio links** for mission-critical systems. * Implement and evolve the **network layer of tactical waveforms**, ensuring interoperability, robustness, and performance. * Develop **network protocols and architectures**: routing, controlled flooding, MANET, and **QoS** mechanisms. * Participate in **software integration** on embedded platforms and distributed systems. * Collaborate on **conceptual channel and radio link modeling** (unclassified). * Validate and verify developed solutions within **complex software life cycles**. * Work closely with other engineering teams to ensure overall system coherence. * Prepare technical documentation and participate in project technical reviews. What are we looking for in you? It is not necessary to meet 100% of the requirements. We want to get to know you and understand what you can contribute. ✅ Demonstrable experience of **5–10 years** in **tactical or mission-critical communications systems**. ✅ Solid knowledge of **radio communications**, network protocols, and **embedded systems architecture**. ✅ Experience in **development of network protocols and distributed architectures** (MANET, routing, QoS). ✅ Experience in **software integration** on embedded platforms or distributed systems. ✅ Knowledge of **channel and radio link modeling** at a conceptual level. ✅ Experience in environments with **complex software life cycles** (DO‑178, ISO/IEC 12207 or equivalent frameworks). Required / Valued Technical Skills * **C / C\+\+** (advanced level). * **Network Management** (advanced). * **Python** for support, automation, and analysis (advanced). Functional Knowledge * **Defense and Security Communications Systems** (advanced). ✅ Analytical capability, results orientation, and teamwork. ✅ Availability to work in **Alcobendas**, under a **hybrid model (40 % remote work annually)**. The Project You will join the **SIAGEN CTN Project**, a strategic initiative in the Defense domain aimed at developing **advanced tactical communications capabilities**, mobile networks, and embedded radio links—key to ensuring interoperability and effectiveness of systems in real operational environments. You will work on a project of **high technological demand**, with direct impact on critical operational capabilities. What We Offer * **Stability and future** ✨: Long-term projects at a leading company in the Defense sector. * **Cutting-edge technology**: Tactical communications and next-generation critical systems. * **Collaborative environment**: Working alongside highly specialized teams. * **Flexibility**: Hybrid model with 40 % annual remote work. * **Technical career plan**: Professional development tailored to your experience. * **Continuous training**: Open University and Udemy for Business (\+6\.000 courses). * **Benefits and discounts**: Leisure, wellness, and flexible compensation. * **Competitive remuneration**, commensurate with profile and responsibilities. What does our selection process look like? Profile review * Initial contact (5‑10 min) * Interview with Talent Attraction * Technical interview * Offer and welcome * * ️ **Estimated duration**: 2 weeks. *We are committed to fostering work environments where people are treated with respect and dignity, promoting professional development of our staff and guaranteeing equal opportunities in recruitment, training, and promotion—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.* INDRA is a **Top Employer 2025**! Join a company certified as one of the best employers in Spain, thanks to our comprehensive HR management and the conditions we offer our professionals.