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Red Team & Penetration Testing Specialist

On-site in Spain·Added 5 days ago (last checked 26 Oct)

Telefónica

206 open roles

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Our summary

Work mode: On-site, Spain
Experience: 3+ years

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The ad doesn’t mention sponsorship
No sponsorship mentioned, and this kind of work is rarely sponsored in Spain.

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Skills

This job advert was originally written in Spanish.

Requirements

What we're looking for

What we are looking for in you

At least 3 years of experience in Intrusion Testing / Pentesting.

Extensive knowledge of web application security.

Ability to autonomously approach the different phases of a pentest: planning, scoping, execution, and reporting.

Ability to develop or modify tools based on project needs.

Development knowledge in Python and Go (Golang).

Experience or knowledge of web development, both Backend with Python and Frontend with Vue.js.

Knowledge of Docker for the deployment of solutions.

Solid understanding of the fundamentals of Artificial Intelligence and its practical application to cybersecurity use cases.

Communication and coordination skills with different technical teams, as well as a collaborative orientation toward the resolution of vulnerabilities.

Nice to have

In addition, we will especially value

Experience in malware development or APT simulation tools.

Knowledge of OS Internals in Windows and Linux.

Knowledge of intrusion in Windows Active Directory environments.

Experience or knowledge of reverse engineering.

The role

At Telefónica Soluciones de Criptografía (TELCRYP) we are looking to hire a Red Team & Penetration Testing Specialist who is eager to grow, contribute their knowledge and experience, and actively participate in the evolution of our Red Team.

We want to attract talent with experience in Intrusion Testing / Pentesting, development knowledge, and a solid understanding of Artificial Intelligence applied to cybersecurity. We are looking for a person with a desire to learn, capable of facing complex technical challenges and collaborating with different teams to identify and contribute to resolving vulnerabilities.

If you are passionate about offensive cybersecurity, enjoy researching new ways to test the security of systems and applications, and want to continue developing in this field, this position may be for you.

What you'll do

Perform Intrusion Testing / Pentesting, participating in all its stages: planning, scoping, execution, and report writing.

Analyze the security of web applications, identifying vulnerabilities and possible areas for improvement.

Develop or modify the tools necessary for the execution of pentests and other team activities.

Communicate and manage results with the teams responsible for the affected systems, collaborating with them in the resolution of the identified vulnerabilities.

Apply software development knowledge to support and evolve the technical capabilities of the Red Team.

Explore and apply Artificial Intelligence in cybersecurity use cases, contributing to the evolution of the team's capabilities.

The attitude that will make the difference

You will be part of a Red Team project in an environment where you can continue learning and contribute your knowledge and experience to help the project evolve.

We are especially looking for:

Passion for offensive cybersecurity and curiosity to understand how systems work and how to improve their security.

Analytical thinking and an orientation toward solving complex technical challenges.

Initiative to research, develop, and adapt tools to the needs of each situation.

Ability to work collaboratively with other technical teams.

Curiosity and continuous learning in the face of evolving threats, technologies, and Artificial Intelligence.

About Telefónica

Telefónica is one of the world's largest telecommunications companies, providing fixed and mobile connectivity, digital services, and technology solutions to consumers and businesses across Europe and Latin America. With over 100,000 employees and a strong presence in Spain, the UK, Germany, and Brazil, the company operates through brands such as Movistar, O2, and Vivo, and has expanded into areas like cybersecurity, cloud, IoT, and AI through its innovation units.

In Spain, Telefónica is headquartered in Madrid and is a major employer of tech talent, with a strong focus on cybersecurity, data, and AI. The company actively hires international professionals, offering roles in English and fostering a diverse, innovative culture. Its Spanish operations are central to its global strategy, making it a relevant option for internationals seeking to work in a large, established tech and telecom player in Spain.

Industry: Telecom
Founded: 1924
Employees: 100,000+
Headquarters: Madrid, Spain
In Spain: Madrid, Barcelona

Good to know if you are moving

Telefónica's Spanish offices are largely based in Madrid and Barcelona, with a significant tech hub in the Distrito Telefónica complex in Madrid.
The company frequently hires international tech talent and many roles are offered in English, making it accessible for non-Spanish speakers.
Telefónica has a strong commitment to innovation, with dedicated units like gAIt and Wayra focusing on AI and startups.
The company offers a comprehensive relocation package and support for international hires, including visa assistance.
With a global presence and a large Spanish operation, Telefónica provides opportunities for internal mobility across countries and roles.

In their own words

About the company & team

Telefónica Soluciones de Criptografía

Additional information

If you want to continue growing in the field of Red Team and offensive security and feel like contributing your talent and experience to relevant projects within Telefónica Soluciones de Criptografía, we want to meet you

All open roles at Telefónica