Senior Offensive Security Engineer H

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Senior Offensive Security Engineer H in Others

Septeo
Full time
Email

Others
09/09/2026
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Montpellier, France

Responsibilities

Design offensive security tools and workflows, including their architecture, scope, safeguards, and stopping rules.
Operate workflows daily through scheduling, launching, monitoring, diagnosing agent drift, triaging false positives, and recovering from incidents.
Prototype security capabilities, measure their practical benefit, and decide what to industrialize or abandon.
Document design choices, including safeguards that were deliberately not implemented and the reasons why.
Report vulnerabilities to remediation teams in directly actionable terms.
Propose new capabilities that would advance the group’s security posture.

Requirements

Experienced penetration tester with application and infrastructure testing experience.
Experience tracking vulnerabilities through remediation and distinguishing exploitable findings from scanner noise.
Ability to specify what should be built, direct a coding agent, review its output, and judge whether the result is sound.
Practical experience orchestrating agentic workflows, monitoring them, diagnosing drift, and correcting them.
Strong Red Team mindset, curiosity, persistence, autonomy, and sound technical judgment.

Benefits

Permanent CDI employment based in Montpellier.
Personalized training and internal mobility opportunities.
Themed events and community activities including afterworks, sport, CSR, and seminars.
An inclusive workplace committed to equal opportunity, diversity, and inclusion.
Opportunity to participate in Septeo’s AI-first transformation and work with artificial intelligence in new ways.

Septeo

Septeo empowers businesses to unlock their full potential through innovative technology solutions that streamline operations, enhance customer engagement, and drive sustainable growth. By blending cutting‑edge software with expert consulting, we help organizations adapt to evolving markets and ac...

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