Freelancer profile translated to English.

Description

I am an engineer and I enjoy creating software solutions for concrete problems: automating time-consuming tasks, enabling communication between disparate systems, and transforming manual, fragile processes into reliable tools.

Graduated from CY Tech (formerly EISTI), I started at Thales as an automatic test tools developer, and today I code in Python and PowerShell whenever a task deserves more than a human repeating it.

Some examples of what I build:

An internal dashboard that centralizes and prioritizes alerts from our agent fleet: turning noise into actionable signals.
An automation between our monitoring system and our ERP—creating tickets and automatically provisioning agents per server based on a preference algorithm, where everything used to be done manually.

What makes my tools truly useful is that they are designed for real-world use. On a daily basis, I administer actual SME infrastructures: Active Directory, Entra ID, Intune, Exchange Online, Sophos XGS (certified), OPNsense, Hyper-V, Veeam, 3CX. Therefore, I have a deep understanding of the environments where my code will run: identities, network, security, backups.

I complement this with an offensive and defensive security approach (AD pentesting in school: Kerberoasting, DCSync, ACL/GPO abuse; hardening firewalls/EDR/MFA/segmentation in real-world scenarios): when I design a solution, I also consider its attack surface.

Concretely, I can develop a custom complex tool, automate a business process, integrate systems that need to communicate, and, if the need arises, audit or secure the accompanying infrastructure.

Give me a specific problem in a complex environment: I will design the solution, make it reliable, and document it.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent
Chinese
Basic

Workplace preferences

Can work on-site

Cergy (up to 50km)

Add-On
Systems, Networks & Cybersecurity Administrator
CONSULTING AND AUDITS
January 2026 - Today (7 months)
Within an MSP managing end-to-end IT infrastructure for SME/ETI clients, I work on a broad scope covering cybersecurity, systems and network administration, as well as internal tool development.

Initiatives & Development
> Development of a dashboard with webhook integration for ticket management and communication with the internal ERP.
Ansible deployment for automating workstation preparation in the workshop (Windows updates, software installation/uninstallation, clean Office/Teams install).
Design of a web application (PowerShell/PODE) interfaced with the Exchange API for OWA rule management.

Cybersecurity
> Sophos Firewall administration (log monitoring, MFA/TTL rules) and Sophos Endpoint (DLP policies: device blocking, webmail, data exfiltration) — 5 Sophos certifications obtained (3 Firewall, 2 Endpoint).
OPNsense and pfSense configuration (NAT/firewall rules, VPN, SFTP).
Implementation of Entra ID MFA with token management in Vaultwarden (self-hosted).
Active Directory audit (password policies, GPO, security).
Drafting of a cybersecurity compliance project (sectoral directive).
Monitoring and patching of vulnerabilities based on CERT advisories (e.g., Veeam).

Systems & Network Administration
> Intune deployments (Win32 packages, PowerShell detection rules). 3CX telephony setup and support. DNS management, server/NAS infrastructure review, hardware quoting. Full client onboarding (AD, Microsoft 365, domain, drivers, printers). Direct client technical support (phone and on-site).

Cross-functional Project
> Implementation of a complete BI pipeline (Apache Hop, SQL, Metabase) for business data visualization.
Cybersecurity Network Administration System Administration
Thales
Apprentice Automatic Test Tool Developer
September 2024 - September 2025 (1 year)
95520 Osny, France
• Development of numerous Python scripts for an automatic test tool project, primarily allowing me to work on my computer vision and software development skills.
• Three GUIs: video player, audio player, and a configuration file creation interface offering highly personalized functions.
• Development of PowerShell scripts to launch tasks on the domain, connect Python scripts, etc.
• Presentations of results to the managers of the company's various departments.
• Capture and replay of user inputs, implementation of a video comparator with OpenCV.
Python Powershell scripting-automation C++
M2M Factory
Developer Intern
June 2022 - August 2022 (2 months)
Vigny, France
• Work with surveillance camera APIs.
• Development of a Node.js server to receive information sent by cameras.
• Development of APIs with Strapi