Information Security Specialist

Are you ready to shape the future of capital markets? We are looking for a Senior Information Security Specialist to join the Cyber Security team. The position will be based in Porto.

You will primarily be responsible for:

• Designing, implementing and maintaining security controls for cloud environments, with a focus on SAAS solutions, Microsoft, Amazon Web Services (AWS)
• Assessing and mitigating internet-facing vulnerabilities, including DNS security and web application exposures
• Conducting security testing using frameworks such as OWASP and industry best practices
• Supporting security governance, ensuring alignment with Euronext’s culture, principles and regulatory requirements
• Collaborating with cross-functional teams to embed security into new and existing solutions
• Providing technical guidance and mentoring to colleagues on security controls and risk mitigation
• Participating in incident response and vulnerability management processes

Your profile:

• Strong technical expertise in information security, with hands-on experience in AWS security controls, DNS, and internet-facing vulnerability management
• Proficient in security testing frameworks, especially OWASP, and familiar with penetration testing methodologies
• Solid understanding of security governance, risk management and compliance frameworks
• Experience with security incident response and vulnerability management
• Excellent analytical, problem-solving and communication skills
• Ability to work collaboratively in a multicultural, international environment
• At least five years of relevant experience in information security roles
• Bachelor’s or Master’s degree in Computer Science, Information Security or a related field; relevant certifications (e.g. AWS Security, CISSP, OSCP) are a plus
• Fluent in English

Join a company where market infrastructure is built on innovation – and where every innovation starts with a bold mind asking, “What’s next?”. At Euronext, we believe change is a starting point, not an obstacle. We look for people who see growth opportunities, think long term and want to help shape capital markets for future generations. Working with us means:

• Being part of a European, international and diverse team – Collaborate across borders with talented colleagues connected by a shared ambition and purpose.
• Learning as you grow – Develop your skills through continuous learning, real responsibilities and flexible career paths that evolve with you.
• Having an impact – Contribute to projects that matter, in an agile and dynamic environment where your ideas help drive progress.
• Driving sustainability – Play an active role in building transparent, responsible and sustainable capital markets for the long term. Together, we do not just support markets – we help shape their future.

Apply by submitting a CV in English

Euronext’s Cyber Security teams build and run the technology, powering Europe’s financial markets. From high-performance trading and post-trade platforms to Clearing House operations and multiple CSDs, our systems process critical market activity every day. Our IT teams design, develop and operate scalable platforms while continuously introducing new capabilities driven by data, automation and AI to better serve our business and clients. With around 800 technology specialists across Milan, Porto, Paris and the Nordics, we deliver end-to-end technology support through two pillars: IT Business Lines, partnering with each core business, and IT Transversal Teams, including Infrastructure and Information Security. Join our team to collaborate with specialists across Europe, contribute to both business-aligned and transversal technology initiatives, and help deliver resilient, innovative solutions for the financial markets.

Join Euronext – Shape capital markets for future generations Euronext is the leading European capital market covering the entire capital markets value chain, from listing, trading, clearing, settlement and custody, to solutions for issuers and investors. We operate seven national stock exchanges, handling 25% of European lit equity trading. Our products include equities, FX, ETFs, bonds, derivatives, commodities and indices. Euronext also provides clearing and settlement services through Euronext Clearing and our network of Euronext Securities CSDs. In addition, Euronext runs MTS, one of Europe’s leading electronic fixed income trading markets, and Nord Pool, the European power market. The company has a diverse domestic and international client base.
Find out more about us at:

Euronext Values

Unity

• We respect and value the people we work with

• We are unified through a common purpose

• We embrace diversity and strive for inclusion

Integrity

• We value transparency, communicate honestly and share information openly

• We act with integrity in everything we do

• We don’t hide our mistakes, and we learn from them

Agility

• We act with a sense of urgency and decisiveness

• We are adaptable, responsive and embrace change

• We take smart risks

Energy

• We are positively driven to make a difference and challenge the status quo

• We focus on and encourage personal leadership

• We motivate each other with our ambition

Accountability

• We deliver maximum value to our customers and stakeholders

• We take ownership and are accountable for the outcome

• We reward and celebrate performance

We are proud to be an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people, who come from diverse backgrounds with different personal experiences and points of view and we are committed to providing an environment of mutual respect.

Additional Information

This job description is only describing the main activities within a certain role and is not exhaustive. It does not prevent to add more tasks, projects.