Telefónica is one of the world's largest telecommunications providers, operating a vast network across Europe and Latin America. Headquartered in Madrid, the company provides a comprehensive suite of services including mobile and fixed connectivity, digital television, and advanced technology solutions such as cybersecurity, cloud computing, and IoT through its major brands like Movistar and O2.

As a Spanish multinational and a cornerstone of the IBEX 35, Telefónica is a primary destination for international professionals in Spain. The company maintains a massive corporate ecosystem that fosters innovation through its Telefónica Tech and Telefónica Global Technology divisions, offering a multicultural environment with significant opportunities for career progression in engineering, data science, and digital transformation.

Founded in 1924 as Compañía Telefónica Nacional de España (CTNE), it was originally a state-owned monopoly before being fully privatized in the 1990s. Since then, it has expanded aggressively into international markets, particularly in Latin America and Europe.

For international professionals

Telefónica is one of Spain's largest employers, providing high job stability and a structured corporate career path.
The company's global headquarters, 'Distrito Telefónica' in Madrid, is a massive campus featuring its own health centers, sports facilities, and diverse dining options.
They offer specialized 'Talentum' programs and internships that are highly accessible to international graduates and young professionals.
While Spanish is the primary language for local operations, English is frequently used within their global technology, cybersecurity, and strategy departments.
The company has a strong presence in multiple Spanish regions beyond Madrid, including major tech hubs in Barcelona and Logroño.

This job was published 4 months ago

Tech_PKI Security Technologies Engineer

Telefónica

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

Job Description

WHAT IS TELEFONICA TECH?

Telefónica Tech is the leading digital transformation company of the Telefónica Group. We have a wide range of integrated technological services and solutions in Cybersecurity, Cloud, IoT, Big Data, Artificial Intelligence, and Blockchain, with which we accompany our clients in their digital transformation.

We are a group of more than 6,200 brave people working daily from different points around the world to achieve excellence, through leadership based on transparency and team spirit. If you identify with our pillars, we look forward to meeting you!

www.telefonicatech.com

WHAT DO WE DO IN THE TEAM?

In the PKI unit within the Architecture and Technical Consulting area of Telefónica Tech, we are responsible for helping our clients define and improve their security infrastructures. We provide security architecture support, as well as technical consulting and audits for the various IT security elements our clients may have.

WHAT WILL YOUR DAY-TO-DAY BE LIKE?

You will work in a department with other security architects and consultants, where you can face a multitude of tasks, such as designing Certificate and PKI architectures, always oriented towards security, and designing and proposing solutions within our clients' IT infrastructure.

AND FOR THIS, WE BELIEVE IT WOULD BE IDEAL IF YOU HAD...

Experience

- Demonstrable experience of at least 3 years in Cybersecurity roles equivalent to the one specified

Education

- Degree in Computer Science, Telecommunications, or equivalent qualification.

Technical Knowledge

- Administration and deployment of PKI (Microsoft CA, EJBCA, Nexus..,
- Signing and validation services (OCSP, CRL, TSA).
- Cryptographic protocols: TLS, S/MIME, IPSec, SSH.
- Ability for cryptographic analysis and resolution of complex problems.
- Constant updating on advances in cybersecurity and quantum computing.
- Symmetric, asymmetric, and hash cryptography.
- ETSI EN 319 standards (signing and sealing).
- X.509 certificate management.
- NIST PQC process and candidate algorithms
- Experience with PQC libraries (liboqs, PQClean).
- Integration of hybrid classical + post-quantum solutions.
- HSMs and cryptographic security modules (FIPS 140-2/3, Common Criteria)

To perform the role, the skills that would fit the team and the project would be:

- Good project manager
- Ability to resolve complex problems
- Meticulousness for fine-tuning configurations
- Good communication to interact with multiple technical teams

LANGUAGES

- Required: fluent Spanish and English.

WHAT DO WE OFFER?

• Work-life balance measures and flexible hours.
• Continuous training and certifications.
• Hybrid remote work model.
• Attractive social benefits package.
• Excellent dynamic and multidisciplinary work environment.
• Volunteering programs.

#SomosDiversos #Fomentamosigualdad

We are convinced that diverse and inclusive teams are more innovative, transformative, and achieve better results.

Therefore, we promote and guarantee the inclusion of all people regardless of gender, age, sexual orientation and identity, culture, disability, or any other condition

We want to meet you! 😊

View original advert (Spanish)

¿QUÉ ES TELEFONICA TECH?

Telefónica Tech es la compañía líder en trasformación digital del Grupo Telefónica. Contamos con una amplia oferta de servicios y soluciones tecnológicas integradas de Ciberseguridad, Cloud, IoT, Big Data, Inteligencia Artificial y Blockchain, con la que acompañamos a nuestros clientes en su transformación digital.

Somos un grupo de más de 6200 personas valientes que trabajamos a diario desde distintos puntos del mundo para alcanzar la excelencia, a través de un liderazgo basado en la transparencia y en el espírItu de equipo. Si te identificas con nuestros pilares, ¡estamos deseando conocerte!

www.telefonicatech.com

¿QUÉ HACEMOS EN EL EQUIPO?

En la unidad de PKI dentro del área de Architecture and Technical Consulting de Telefónica Tech nos encargamos de ayudar a nuestros clientes a definir y mejorar sus infraestructuras de seguridad. Realizamos apoyo de arquitecturas de seguridad, así como consultorías y auditorías técnicas en los diferentes elementos de seguridad TI que puedan tener nuestros clientes.

¿CÓMO SERÁ TU DÍA A DÍA?

Trabajarás en un departamento con otros de arquitectos y consultores de seguridad, donde podrás enfrentarte a multitud de tareas, como diseñar arquitecturas de Certificados y PKI, siempre orientadas a la seguridad y al diseño y propuestas de soluciones dentro de la infraestructura IT de nuestros clientes.

Y PARA ELLO, CREEMOS QUE SERÍA IDEAL QUE CONTARAS CON...

Experiencia

- Experiencia demostrable de al menos 3 años en roles de Ciberseguridad equivalentes al especificado

Formación

- Titulación Informática, Telecomunicaciones o Titulación equivalente.

Conocimientos técnicos

- Administración y despliegue de PKI (Microsoft CA, EJBCA, Nexus..,
- Servicios de firma y validación (OCSP, CRL, TSA).
- Protocolos criptográficos: TLS, S/MIME, IPSec, SSH.
- Capacidad de análisis criptográfico y resolución de problemas complejos.
- Actualización constante en avances de ciberseguridad y computación cuántica.
- Criptografía simétrica, asimétrica y hash.
- Estándares ETSI EN 319 (firma y sellado).
- Gestión de certificados X.509.
- Proceso NIST PQC y algoritmos candidatos
- Experiencia con librerías PQC (liboqs, PQClean).
- Integración de soluciones híbridas clásicas + post-cuánticas.
- HSMs y módulos de seguridad criptográfica (FIPS 140-2/3, Common Criteria)

Para desempeñar el rol, las skills que encajarían con el equipo y el proyecto serían:

- Buen gestor de proyectos
- Capacidad para la resolución de problemas complejos
- Meticulosidad para el ajuste fino de las configuraciones
- Buena comunicación para interactuar con múltiples equipos técnicos

IDIOMAS

- Necesario: español e inglés fluido.

¿QUÉ OFRECEMOS?

• Medidas de conciliación y flexibilidad horaria.
• Formación continua y certificaciones.
• Modelo híbrido de teletrabajo.
• Atractivo paquete de beneficios sociales.
• Excelente ambiente de trabajo dinámico y multidisciplinar.
• Programas de voluntariado.

#SomosDiversos #Fomentamosigualdad

Estamos convencidos/as de que los equipos diversos e inclusivos son más innovadores, transformadores y consiguen mejores resultados.

Por ello promovemos y garantizamos la inclusión de todas las personas sin importar género, edad, orientación e identidad sexual, cultura, discapacidad o cualquier otra condición

¡Queremos conocerte! 😊