Pentester, Offensive Forward Deployment Engineer

Mistral

Paris

Sur place

EUR 60 000 - 90 000

Plein temps

14 jours+

Recevez plus de réponses des employeurs

Envoyez un CV adapté au poste en quelques minutes.

Avantages offerts par ce poste

Competitive salary and equity (stock-options)

Health insurance

Transportation allowance

Sport allowance

Meal vouchers

Private pension plan

Generous parental leave policy

Visa sponsorship

Résumé du poste

Mistral is seeking hands-on Pentesters to join our Offensive Security team. In this role, you will run our offensive security solutions on real client engagements while hunting for vulnerabilities in Mistral's systems. You will directly impact both our clients' security posture and Mistral's defensive capabilities.

The position encourages remote work across Europe, ideally based in Paris or London, and offers several benefits including competitive salary, health insurance, and generous parental leave policy.

Qualifications

Proven track record of delivering high-quality penetration testing results.
Strong problem-solving abilities and attention to detail in vulnerability identification.
Comfortable being client-facing and mobile.

Responsabilités

Run offensive security solutions on real client engagements.
Find vulnerabilities in Mistral's own systems.
Guide the development of AI-powered offensive security capabilities.

Connaissances

Web / AppSec and source-code review

Active Directory

Cloud (AWS/GCP/Azure)

CI/CD & supply chain

Description du poste

About Mistral

At Mistral AI, we believe in the power of AI to simplify tasks, save time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life.

We democratize AI through high-performance, optimized, open-source and cutting‑edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise needs, whether on‑premises or in cloud environments. Our offerings include le Chat, the AI assistant for life and work.

We are a dynamic, collaborative team passionate about AI and its potential to transform society.

Our diverse workforce thrives in competitive environments and is committed to driving innovation. Our teams are distributed between France, USA, UK, Germany and Singapore. We are creative, low‑ego and team‑spirited.

Join us to be part of a pioneering company shaping the future of AI. Together, we can make a meaningful impact. See more about our culture on https://mistral.ai/careers.

Role summary

We are seeking hands‑on Pentesters to join our Offensive Security team. You will be running our maturing offensive solution on real clients’ engagements while also hunting for vulnerabilities in Mistral's own systems and in the wild. This is a unique opportunity to break real client systems, discover 0‑days for fun, and help build the AI that automates offensive security at scale.

Your work will directly impact both our clients’ security posture and Mistral's own defensive capabilities. You'll be at the forefront of our offensive security practice, with the chance to shape how AI transforms penetration testing. We welcome offensive security experts at all levels who are passionate about breaking systems and building the tools that make security testing more effective.

What you will do

Client Engagements

Run our offensive security solution on real client engagements: scoping, executing tooling, and delivering results
Triaging output and killing false positives to ensure high‑quality, actionable findings for clients
Advise clients through deployment and remediation, acting as a trusted security partner
Travel to client premises and switch between engagements in a classic pentest consulting cadence

Internal Dogfooding

Pentest Mistral's own systems, finding vulnerabilities before our offensive solution matures
Hunt for vulnerabilities internally and on open‑source/in‑the‑wild targets between client engagements
Transfer knowledge and findings to the forming internal security team
Act as Mistral's own first customer for our cyber harnesses

Guiding the Harness

Use real offensive expertise to steer the cyber harness: identify vulnerabilities it should catch
Validate and triage the harness's output, ensuring it meets the high standards of human pentesters
Benchmark human vs. agent performance, helping to close the gap between automated and manual testing
Contribute to the development of AI‑powered offensive security capabilities

About you

Current P0 specialty: web / AppSec + source‑code review; also high‑value: internal / Active Directory, cloud (AWS/GCP/Azure), CI/CD & supply chain
Senior enough to run an engagement solo from scoping to delivery
Uses AI in your workflow with a nuanced view of its capabilities and limitations
Comfortable being client‑facing, mobile, and switching between different engagements
Proven track record of delivering high‑quality penetration testing results
Strong problem‑solving abilities and attention to detail in vulnerability identification

It would be ideal if you also have:

Build your own offensive tooling (builder mindset that scales your impact)
Published CVEs / GHSAs or a strong bug‑bounty track record
Conference talks, CTF achievements, or other public recognition in the security community
Strong code review skills for multiple programming languages
Experience with AI/ML systems and their unique security challenges
Contributions to open‑source security tools or research

Location & Remote

This role is open to remote in Europe. Ideally you would be based in one of our European offices (Paris, France and London, UK). We strongly believe in the value of in‑person collaboration and we encourage going to the office as much as we can (at least 3 days per month) to create bonds and smooth communication. Our remote policy aims to provide flexibility, improve work‑life balance and increase productivity.

What we offer