Indra is a leading global technology and consulting company and a major player in the defense and transportation sectors. As one of the largest Spanish multinationals, it operates through two main brands: Indra, focusing on Defense and Transport, and Minsait, which handles Information Technology and Digital Transformation. The company is a key partner in major international projects, including the development of the Eurofighter and the FCAS (Future Combat Air System).

Headquartered in Madrid, Indra maintains a massive footprint across Spain with specialized centers in cities like Barcelona, Seville, and Gijón. For international professionals, Indra offers a stable environment within a high-tech ecosystem, frequently hiring for roles in AI, cybersecurity, and aerospace engineering. The company provides various flexible work arrangements, including remote-first positions for specific technical roles and a strong focus on professional development.

Formed in 1993 from the merger of several Spanish technology companies, Indra has grown into a global leader in defense and IT. It is currently a constituent of the IBEX 35 index and has expanded significantly through international acquisitions.

For international professionals

Major employer for STEM profiles, particularly in aerospace, defense, and digital transformation.
Offers flexible work models, including hybrid and 100% remote options for many IT and software engineering roles.
Key participant in large-scale European defense and infrastructure projects, offering exposure to cutting-edge technology.
Provides opportunities for internal mobility across its global operations in over 140 countries.
Regularly hires for highly specialized engineering roles such as Radar Systems, RF Design, and AI Engineering.

QKD & QKDN Network Engineer - Alcobendas (Madrid), Hybrid

Indra

This job was originally posted in Spanish and automatically translated to English. You'll most likely need Spanish to apply.

Job Description

At Indra Group, we protect what matters most.

We lead the development of secure communication solutions and quantum technologies that reinforce national and international security, participating in strategic R&D projects and cutting-edge experimental networks within the field of Defense and Security.

💻 Join our quantum communications project team!

As a leading company in defense and critical technologies, we want to strengthen our team with a QKD and QKDN Network Engineer to join Project Garbo, a strategic project in the field of secure communications and quantum cryptography, participating in the design and validation of experimental quantum networks.

💡 What will you do?

• Participate in the design and definition of QKDN network architectures in accordance with ITU and ETSI standards.

• Implement and configure QKDN network components (QKD Controller, Network Manager, agents, etc.).

• Develop and integrate functionalities in experimental networks to validate technical requirements.

• Execute functional and performance tests to verify compliance with project KPIs.

• Collaborate in the design of test plans and test cases for secure communication systems and solutions.

• Work in Linux environments and participate in debugging and analysis tasks.

• Contribute to technical documentation and the evolution of quantum and classical cryptography solutions.

• Collaborate with multidisciplinary teams in an advanced R&D environment.

🎯 What are we looking for in you?

Don't worry if you don't meet 100% of what we are looking for. Go ahead, discover our proposal and tell us what you can bring to the team! 🚀

✅ Degree in Engineering (Telecommunications, Computer Science, Electronics, or similar).

✅ Experience (1-2 years) in QKD or secure communication technologies.

✅ Knowledge of QKDN networks and their components according to ITU/ETSI standards.

✅ Knowledge of symmetric and asymmetric cryptography.

✅ Experience working in Linux environments.

✅ Intermediate level programming in C / C++.

✅ Knowledge of network management.

✨ What we offer you

• Stability and Future 🏢✨: Long-term projects in a leading Defense company with more than 60,000 professionals, with financial security.
Innovative and High-Impact Projects 🚀: You will work with cutting-edge technologies, with an impact at both national and international levels.
Close and Transparent Environment 🤝: You will enjoy direct and fluid communication with managers and colleagues, in a collaborative and open environment.
Autonomy and Flexibility ⏳: You will have the freedom to organize your work, with a real work-life balance adapted to your pace.
Career plan tailored to you 📈: Designed to boost your professional growth and development.
Continuous training 📚: via Open University and Udemy for Business (more than 6,000 courses to specialize!).
Exclusive discounts for your well-being 🎁: Enjoy benefits at gyms, restaurants, shops, leisure, and more as an Indra employee.
Competitive remuneration 💰 and flexible compensation plans 💸📊 tailored to your needs.

🕓 What is our selection process like?

Profile review 🔍: We evaluate your experience and skills to determine if you fit what we are looking for.
First contact (5-10 min) 📞: If you receive a call from an unknown number, it's our team! It will be a quick conversation to get to know you and resolve any doubts.
Technical interview 🤝: You will meet with the team, who will explain the project and daily tasks. We will also explore your technical knowledge. Additionally, we will conduct brief psychological competence and English tests (if necessary).
Interview with the talent attraction team 🤝: We want you to get to know us better as a company: values, career model, skills... so that both you and the team can analyze if there is a match.
Offer and welcome 🎉: If everything goes well, you join our team and we begin this new stage together!

Estimated process time: 2 weeks.

Our commitment is to promote work environments where people are treated with respect and dignity, striving for the professional development of the workforce and guaranteeing equal opportunities in selection, training, and promotion, offering a work environment 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 2026 company! Join a company certified as one of the best employers in Spain, thanks to our comprehensive HR management and the conditions provided to our professionals.

View original advert (Spanish)

En Indra Group, protegemos lo que más importa.

Lideramos el desarrollo de soluciones de comunicaciones seguras y tecnologías cuánticas que refuerzan la seguridad nacional e internacional, participando en proyectos estratégicos de I+D y redes experimentales de última generación dentro del ámbito de Defensa y Seguridad.

💻 ¡Únete a nuestro equipo de proyectos de comunicaciones cuánticas!

En nuestro posicionamiento como compañía líder en defensa y tecnologías críticas, queremos reforzar nuestro equipo con un/a Ingeniero/a en QKD y redes QKDN para incorporarse al Proyecto Garbo, un proyecto estratégico en el ámbito de las comunicaciones seguras y la criptografía cuántica, participando en el diseño y validación de redes cuánticas experimentales.

💡 ¿Qué harás?

• Participar en el diseño y definición de arquitecturas de redes QKDN conforme a estándares ITU y ETSI.

• Implementar y configurar componentes de redes QKDN (QKD Controller, Network Manager, agentes, etc.).

• Desarrollar e integrar funcionalidades en redes experimentales para validar requisitos técnicos.

• Ejecutar pruebas funcionales y de rendimiento para comprobar el cumplimiento de KPIs de proyecto.

• Colaborar en el diseño de planes y casos de prueba de sistemas y soluciones de comunicaciones seguras.

• Trabajar en entornos Linux y participar en tareas de depuración y análisis.

• Contribuir a la documentación técnica y a la evolución de soluciones de criptografía cuántica y clásica.

• Colaborar con equipos multidisciplinares en un entorno de I+D avanzado.

🎯 ¿Qué buscamos en ti?

No te preocupes si no cumples el 100% de lo que buscamos. ¡Anímate, conoce nuestra propuesta y cuéntanos lo que nos puedes aportar! 🚀

✅ Formación en Ingeniería (Telecomunicaciones, Informática, Electrónica o similar).

✅ Experiencia (1-2 años) en QKD o tecnologías de comunicaciones seguras.

✅ Conocimientos de redes QKDN y sus componentes conforme a estándares ITU/ETSI.

✅ Conocimientos de criptografía simétrica y asimétrica.

✅ Experiencia trabajando en entornos Linux.

✅ Programación en C / C++ a nivel medio.

✅ Conocimientos de gestión de redes.

✨ Lo que te ofrecemos

• Estabilidad y Futuro 🏢✨: Proyectos a largo plazo en una empresa líder de Defensa con más de 60.000 profesionales, con seguridad financiera.
Proyectos Innovadores y de Alto Alcance 🚀: Trabajarás con tecnologías de vanguardia, con un impacto tanto a nivel nacional como internacional.
Ambiente Cercano y Transparente 🤝: Disfrutarás de una comunicación directa y fluida con responsables y compañeros, en un entorno colaborativo y abierto.
Autonomía y Flexibilidad ⏳: Tendrás libertad para organizar tu trabajo, con una conciliación real y adaptada a tu ritmo.
Plan de carrera adaptado a ti 📈: Diseñado para impulsar tu crecimiento y desarrollo profesional.
Formación continua 📚: en Open University y Udemy for Business (¡más de 6.000 cursos para especializarte!).
Descuentos exclusivos para tu bienestar 🎁: Disfruta de ventajas en gimnasios, restaurantes, tiendas, ocio y mucho más al ser empleado de Indra.
Retribución competitiva 💰 y planes de compensación flexibles 💸📊a tus necesidades.

🕓 ¿Cómo es nuestro proceso de selección?

Revisión de tu perfil 🔍: Evaluamos tu experiencia y habilidades para determinar si encajas con lo que buscamos.
Primera toma de contacto (5-10 min) 📞: Si recibes una llamada de un número desconocido, ¡es nuestro equipo! Será una conversación rápida para conocerte y resolver cualquier duda.
Entrevista técnica 🤝: Te reunirás con el equipo, quienes te explicarán el proyecto y las tareas diarias. También exploraremos tus conocimientos técnicos. Además, te realizaremos breves pruebas de competencias psicológicas e inglés (si es necesario).
Entrevista con el equipo de atracción de talento🤝: Queremos que nos conozcas mejor como empresa: valores, modelo de carrera, skilss.... para que tanto tu como el equipo de pueda analizar si hay match.
Oferta y bienvenida 🎉: Si todo va bien, ¡te incorporas a nuestro equipo y comenzamos esta nueva etapa juntos!

Tiempo Estimado de proceso: 2 semanas.