Senior Infrastructure Security Engineer

Hey there, Cybersecurity Enthusiasts!

Factorial is looking for a skilled and experienced Senior Infrastructure Security Engineer to join our team and reinforce the end-to-end security management of our systems and cloud environments. In this role, you will be the guardian of our core foundations, taking full ownership of infrastructure security from risk assessment and vulnerability management to proactive defense and incident response.

As a key member of the Security Team, you will ensure that our global infrastructure remains resilient, compliant, and secure. You’ll work closely with SRE and IT teams to maintain a strong security posture, implementing hardening strategies and managing the entire lifecycle of infrastructure risks.

The Mission:

• End-to-End Infrastructure Management: Drive the security strategy for our cloud environments, ensuring security is baked into the architecture from day one.
• Vulnerability \& Risk Management: Lead the identification, assessment, and remediation of infrastructure vulnerabilities. Maintain the infrastructure risk register and prioritize mitigation efforts based on business impact.
• Hardening \& Resilience: Implement and maintain rigorous hardening strategies across our infrastructure to increase resilience against sophisticated cyberattacks.
• Detection \& Response: Continuously monitor security alerts and incidents. Conduct thorough incident response and detailed investigations to identify root causes within the infrastructure stack.
• Tooling \& Automation: Develop and manage infrastructure security tooling (CNAPP, CSPM, Vulnerability Scanners) to ensure accurate threat detection and automated compliance.
• Secure Delivery Pipelines: Secure the infrastructure and runners within our CI/CD pipelines, ensuring the environment where code is built and deployed is protected.
• Collaboration: Partner with IT, DX and SRE teams to integrate infrastructure security best practices and automate security controls.
• Strategy \& Documentation: Develop, maintain, and regularly update incident response plans and infrastructure security policies.

Your Profile:

• 5+ years of experience in Infrastructure Security or Security Engineering, specifically within Cloud environments (AWS/Azure), Infrastructure as Code (Terraform), and Containerization (Kubernetes).
• Vulnerability Management Expert: Deep experience managing enterprise-grade vulnerability scanning and risk prioritization workflows.
• Infrastructure Specialist: Strong understanding of network security, OS hardening (Linux/Unix), and identity management (IAM).
• Threat Knowledge: Strong understanding of Cyberattacks and Threat Actor Tactics, Techniques, and Procedures (TTPs) related to infrastructure and cloud escape.
• Tooling Proficiency: Experience using and managing EDR, CNAPP, SIEM, and vulnerability management solutions (e.g., Tenable, Qualys, or Wiz).
• Automation Mindset: Proficiency in scripting and automation using Python, Bash, or similar languages to streamline security operations.
• Education: Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience.
• Bonus Points: Industry certifications.

How We Work

At Factorial, we believe the best products are built when people come together—in person—to collaborate, challenge ideas, and move fast. That’s why our Engineering Team follows an office-first, flexible approach.

We work on-site several days a week (80%), using that time to connect, align, and innovate as a team. However, we also support remote work when it makes sense (20%) for deep focus or personal needs.

Perks of being part of our team

• High growth, multicultural and friendly environment
• Continuous training and learning based on your needs
• Alan private health insurance
• Healthy life with Wellhub (Gyms, pools, outdoor classes)
• Save expenses with Cobee
• Language classes with Preply
• Get the most out of your salary with Payflow

And when at the office...

• Breakfast in the office and organic fruit
• Nora and Apeteat discounts
• Pet Friendly

About Factorial

Factorial is an innovative Business Management Software solution designed to streamline company processes for small and medium-sized enterprises. Founded in 2016, our mission is to help companies automate workflows, centralize people data, and make better business decisions. With customers across over 60 countries, we've built a diverse team that's driving change in the tech space.

Our Values

• We own it: We take responsibility for every project.
• We learn and teach: We share knowledge every day.
• We partner: Every decision is a team decision.
• We grow fast: We act fast and learn from our mistakes.

Join Factorial, where people grow

Diversity is part of our culture. We have more than 43 nationalities and provide an inclusive environment for all. Please feel free to apply however suits you best (blind resume, identity pronouns, cover letter, etc.). We do not discriminate; we encourage everyone to join us!