Security Testing Specialist - Luxembourg - Near site

#HumanizingTechnology

ABOUT SEIDOR

At SEIDOR, we help drive the transformation and competitiveness of our clients through technology and innovation, always focusing on the value of the human side and being committed to talent and sustainable development.

We are a diverse and inclusive organization that believes in equal opportunities. We already have over 8,000 professionals in 45 countries across Europe, Latin America, the United States, the Middle East, Africa, and Asia.

Here, you can develop and grow both professionally and personally from day one, with the support of a great team that shares human values.

We carry out projects with a positive impact at both national and international levels, serving clients from different industries and collaborating closely with the leading technology providers (such as SAP, Microsoft, Salesforce, IBM, Google, AWS, Cisco, Adobe). We are one of the most recognized and awarded companies by our partners.

We are committed to sustainability and promote ESG (Environmental, Social, and Governance) criteria to achieve sustainable development. We have reduced and offset our carbon footprint, becoming a net-zero company.

At SEIDOR, we believe that to address the challenges of the digital world and the new hurdles that arise, we must have the best allies, market-leading technologies, and, above all, the best people.

Will you join us in humanizing technology?

ABOUT THE JOB

We are a large company with a start-up spirit. We organize ourselves into expert knowledge Units that collaborate with each other.

That's why we are looking for curious individuals who are motivated by challenges and eager to grow personally and professionally, to join our team and make a positive impact on the world through technology.

ARE YOU UP FOR THE CHALLENGE?

We want you to be a part of our team, from Luxembourg, as a Security Testing Specialist.

WHAT WILL YOU DO IN YOUR DAY-TO-DAY?

• Plan and perform ethical hacking engagements and full-scope penetration tests (web, API, infrastructure, cloud when applicable)

• Conduct and automate vulnerability scans, analyze results, prioritize risks

• Perform source code reviews, identify insecure coding patterns, and recommend remediation

• Support the Secure SDLC, identifying weaknesses early in the lifecycle

• Produce detailed security assessment reports, test plans, and scripts

• Analyze root causes of security defects and propose corrective actions

• Contribute to security architecture evaluations and compliance testing

• Collaborate with developers, architects, and stakeholders to ensure secure design and implementation

WHAT DO WE EXPECT FROM YOU?

• Ethical Hacking & Development (Newly Mandatory per Client Feedback)


• CEH (Certified Ethical Hacker) or equivalent certification


• Minimum 5 years of experience in cybersecurity testing


• University degree in IT, engineering, or equivalent experience


• Certifications such as OSCP, GIAC, CISSP are advantageous


• Strong development experience (e.g., Python, Java, C#, or similar)


• Proven experience in secure coding and source code review


• Solid understanding of application architectures and common coding vulnerabilities Penetration Testing & Security Tools


• Hands-on experience with:

1. o Burp Suite, OWASP ZAP, Metasploit


2. o Nessus, Qualys, OpenVAS

• OS expertise: Linux and Windows


• Scripting languages: Python, Bash, PowerShell


• Web & API security: REST, SOAP, JSON, XML


• Strong knowledge of: o OWASP Top 10 o Secure SDLC o DevSecOps practices


• Strong reporting and documentation skills in English and French


• Desirable:

o Knowledge of cloud security controls (Azure, AWS, GCP)

o Experience with SIEMs and log analysis

o Familiarity with compliance frameworks: ISO 27001, NIST, CIS

WHAT WILL YOU FIND AT SEIDOR?

• A diverse team. We respect the differences that make us more human.


• Companionship. We work as a team and learn from each other.


• Flexibility and work-life balance. Remote working is in our DNA. We promote flexible working hours and offer shorter working day every Friday, as well as in the months of July and August.


• Continuous learning. Language courses, technical training, certifications, and more.


• Personalized career development, allowing you to decide where you want to go.


• Autonomy and the opportunity to suggest and promote new opportunities.


• Flexible compensation program. Childcare vouchers, restaurant benefits, transportation, and health insurance.


• Exclusive discounts and special conditions on technology, leisure, travel, and more.


• You can be part of charitable and environmentally related initiatives.


• If you have international interests, we are present in 45 countries.

Join our team and help us humanize the world through technology!

-