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Cybersecurity / Pentest Engineer

Senior Infrastructure / Linux Security Engineer

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Cybersecurity / Pentest Engineer

Luxemboug, Luxembourg

Employee

100% Remote Job / Full Remote

ATS4IT supports its clients in their digital transformation initiatives and AI driven innovations, in different sectors and it's a part MoOngy Group, with over 9,500 employees across Europe, we bring extensive expertise across a wide range of IT domains. With teams in Belgium, Denmark, and a nearshore center in Portugal, we deliver proximity, agility, and real impact across Europe.

Cybersecurity / Pentest Engineer

Location: Luxembourg
Languages: Fluent French and English
Eligibility: A valid EU work permit is mandatory

About the Role

We are looking for an experienced Cybersecurity / Pentest Engineer (French-speaking) to support our client projects by securing and maintaining their e-commerce platforms and DMZ environments.

Profile

Bachelor's or Master's degree in Computer Science, Cybersecurity, Information Security, or a related field.
Minimum 5 years of experience in Cybersecurity, Penetration Testing, or Application Security.
Strong analytical and problem-solving mindset.
Excellent communication skills with the ability to explain technical findings to different stakeholders.
Ability to work independently and collaboratively within cross-functional teams.
Detail-oriented with a proactive approach to identifying and mitigating security risks.

Requirements

Proven experience in web application security testing and penetration testing.
Deep understanding of OWASP Top 10 vulnerabilities and common attack vectors.
Experience securing e-commerce platforms such as Magento, Adobe Commerce, Shopify, or similar.
Hands-on experience with security testing tools including Burp Suite, OWASP ZAP, Nessus, Nmap, Metasploit, Kali Linux, and Wireshark.
Experience testing REST APIs, GraphQL APIs, and microservices-based architectures.
Knowledge of authentication and authorization protocols such as OAuth2, OpenID Connect, SAML, and JWT.
Strong understanding of network, cloud, and infrastructure security concepts.
Experience performing vulnerability assessments and producing detailed security reports.
Familiarity with secure development practices and Security by Design principles.
Relevant certifications such as OSCP, CEH, OSWE, or CISSP are considered a plus.

Key Responsibilities

Perform comprehensive penetration testing of web applications, APIs, and e-commerce platforms.
Conduct security assessments of Magento-based applications and supporting infrastructure.
Identify, analyze, validate, and report security vulnerabilities, including OWASP Top 10 risks.
Execute manual and automated security testing on B2B and B2C websites.
Assess authentication, authorization, session management, and access control mechanisms.
Review payment workflows and third-party integrations to identify potential security weaknesses.
Evaluate application architecture from a security perspective and provide improvement recommendations.
Collaborate with development, infrastructure, and business teams to support vulnerability remediation.
Ensure compliance with security best practices, standards, and internal security requirements.
Contribute to the continuous improvement of the organization's cybersecurity posture.

What We Offer

Permanent Contract (CDI) – Long-term stability.
Attractive salary based on your experience and skills.
Additional benefits: Meal vouchers and eco-vouchers (electronic), DKV hospitalization insurance, company laptop, holiday allowance, and year-end bonus.
Free training (technical, behavioral, language) and certifications.
Continuous and personalized career progression support.
Opportunities to work on projects with cutting-edge technologies.

At Moongy Group, we stand for equality and diversity. We create a safe and inclusive environment where opportunities are equal for everyone! We do not discriminate based on age, ethnicity, gender, disability, sexual orientation, or any factor other than merit. If you have the skills for the role, we encourage you to apply!

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Senior Infrastructure / Linux Security Engineer

Bruxelas, Belgium

Employee

Partial Remote Job

Senior Infrastructure / Linux Security Engineer

Location: Brussels (Hybrid)
Languages: C2 English
Nice to Have: French
--> Due to project-specific security and compliance requirements, only EU citizens are eligible to apply for this position.

About the Role

We are looking for an experienced Senior Infrastructure / Linux Security Engineer to join a dynamic team responsible for securing, maintaining, and evolving critical Linux-based infrastructure environments. The ideal candidate combines strong expertise in Linux administration, infrastructure security, vulnerability management, automation, and cloud technologies, with a proactive approach to ensuring system reliability and security.

Profile

Bachelor's or Master's degree in Computer Science, Cybersecurity, Information Technology, or a related field.
More than 10 years of experience in Infrastructure Engineering, Linux Administration, or IT Security.
Strong analytical and troubleshooting skills.
Excellent communication and collaboration abilities.
Ability to work effectively in Agile and cross-functional environments.
Security-focused mindset with a commitment to continuous improvement and operational excellence.

Requirements

Mandatory

10+ years of experience in Linux Infrastructure and Security.
Strong expertise with Red Hat Enterprise Linux (RHEL) and Linux system administration.
Experience with system hardening, vulnerability management, and patch management.
Strong knowledge of Identity & Access Management (IAM) concepts.
Experience with SIEM solutions, log analysis, and security monitoring.
Good understanding of network security, firewalls, and secure communication protocols.
Experience with shell scripting and automation.
Knowledge of security frameworks and compliance standards.
Experience investigating and resolving security incidents.

Strongly Preferred

Experience with Microsoft Defender, CrowdStrike, Splunk, Elastic, or similar security platforms.
Experience with Docker and container security.
Experience working with AWS and/or Azure environments.
Knowledge of Ansible, Terraform, or Infrastructure-as-Code practices.
Experience with endpoint protection and vulnerability assessment tools.
Knowledge of Zero Trust and modern security architectures.

Nice to Have

French language skills.
Security certifications such as Security+, CISSP, CEH, or equivalent.
Experience with Kubernetes security.
Experience in highly regulated or enterprise environments.

Key Responsibilities

Manage, secure, and optimize Linux-based infrastructure environments.
Monitor security events and investigate potential threats and incidents.
Implement security controls, hardening standards, and vulnerability remediation plans.
Maintain patching and update processes across infrastructure platforms.
Automate operational and security-related tasks.
Collaborate with infrastructure, cloud, and security teams to improve platform resilience.
Support security audits, compliance initiatives, and risk assessments.
Contribute to incident response and root cause analysis activities.
Improve monitoring, logging, and threat detection capabilities.
Promote security best practices across the organization.

Technical Environment

Red Hat Enterprise Linux (RHEL)
Linux Administration
IAM
SIEM
Splunk / Elastic
Microsoft Defender
CrowdStrike
Vulnerability Management
Docker
Bash / Shell Scripting
Ansible / Terraform
AWS and/or Azure
Security Monitoring & Incident Response
Agile/Scrum

What We Offer

Permanent Contract (CDI) – Long-term stability.
Attractive salary based on your experience and skills.
Additional benefits: Meal vouchers and eco-vouchers (electronic), DKV hospitalization insurance, company laptop, holiday allowance, and year-end bonus.
Free training (technical, behavioral, language) and certifications.
Continuous and personalized career progression support.
Opportunities to work on projects with cutting-edge technologies.

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