Freelancer profile translated to English.
Back to original languageAbout Mathieu
👨💻 My journey
Former backend developer and DevOps engineer, I moved into offensive security out of a passion for hacking.
I foundedExpert Intrusionto help companies evaluate and concretely improve their security.
I work with startups, VSEs/SMEs, groups, and institutions in Guadeloupe, Martinique, and mainland France.
🛡️ Services
→ Penetration tests:Web, Active Directory, Cloud, Mobile, WiFi
→ Simulatedphishing campaigns
→Cybersecurity consulting(Security by Design)
→ Cybersecurity awareness training
💪 My strengths
→OSCPandCARTPcertifications
→ Dual expertise in development (backend/DevOps) + pentesting
→Tailored recommendationsfor your technical and business realities
French
Native or bilingual
English
Fluent
Can work on-site
Créteil (up to 20km), Nantes (up to 10km), Rennes (up to 10km)
Experience
- Expert IntrusionPentesterCONSULTING AND AUDITSNovember 2021 - Today (4 years and 7 months)GuadeloupePenetration tests and cybersecurity audits for companies:• Web Applications• Active Directory and internal networks• Cloud environments• Mobile applications• WiFi networks• Simulated phishing campaigns• Cybersecurity consulting (Security by Design)Cybersecurity awareness training for companies and educational institutions.
- Naïas formationCybersecurity Trainer - Master in Digital Marketing ManagementE-COMMERCEFebruary 2024 - June 2025 (1 year and 3 months)Basse-Terre, GuadeloupeQuarterly sessions for Master's students in 'Digital Marketing Management' to raise awareness about cybersecurity.Learning Objectives:• Understand cybersecurity basics (threats, best practices, business implications)• Acquire initial reflexes and security audit notions• Adopt a cybersecurity mindset in a professional environment
- proLogistik FranceDevOps EngineerLOGISTICS AND SUPPLY CHAINDecember 2018 - June 2020 (1 year and 6 months)Nantes, FrancePentest:• Web application penetration tests• Use of the OWASP Top 10 repository• Vulnerable dependency scanning• Code review using OWASP Top 10 rules in SonarQubeDevOps:• Industrialization of Progress/Java/Angular developments for solution teams• Evolution of the in-house non-regression testing tool• Maintenance of the software factory (CI/CD tools, Docker containers)• Writing documentation and best practicesTesting:• Internal training on Katalon Studio• Creation and execution of test plans• Creation of automated tests with Katalon StudioAMOA (IT Project Management Assistance):• Writing functional specifications (porting a Windows CE application to Android)• Monitoring and verifying project progress and compliance with specifications• Validation of the technical architecture documentation• Creation of test data sets and integration environment• Acceptance testing of the Android application• Creation and execution of test plans• Android development in Kotlin
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Education
- Manager of Information Systems and Infrastructure (Level Bac+5 Title)ENI Ecole Informatique2016Conception / Administration / Gestion d'un Système d'Information
- Computer Design and Development (Level Bac+4 Title)ENI Ecole Informatique2014Conception / Développement Informatique
Certifications
- OSCP - Offensive Security Certified ProfessionalOffSec2021
- CARTP - Certified Azure Red Team ProfessionalAltered Security2025