Jules THIBAULT - Portfolio

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Cybersecurity engineer with a developer background. I build, break, and secure systems with a hands-on mindset, driven by curiosity and a love for solving real problems.

My Blog

Skills and technologies

Development

Python

JavaScript

Bash

SQL

PowerShell

Java

PHP

Systems & Infrastructure

Linux

Windows

VMware

Docker

Kubernetes

Active Directory

Cybersecurity

DevSecOps

Penetration Testing

Vulnerability Assessment

SIEM

Forensics

Network Security

Tool Development

Cloud & DevOps

AWS

Azure

GCP

Jenkins

Git

Splunk

Projects

Dork Generator

A Google dork generator focused on pentesting, featuring a modern and intuitive interface for security professionals.

Code Demo

Code audit app

An application that allows you to audit your code by simply uploading it.

SecMalloc

A secure malloc() implementation designed to detect memory vulnerabilities (overflows, use-after-free...), essential for secure development.

Code

JSON Parser

An interactive JSON parsing tool to visualize syntactic structure — ideal for debugging and data analysis.

Code Demo

Experiences

Thales

Apprenticeship · 2 years

Lille, France

Pentester

January 2025 - Present

Performed web application penetration tests and wrote detailed reports. Developed offensive tools tailored for specific engagements.

DevSecOps

September 2023 - Present

Trained development teams on secure coding practices. Wrote internal secure development guides. Benchmarked SAST/DAST/IAST tools, created vulnerable applications for training, and participated in DSOMM/SAMM maturity audits.

Decathlon

Apprenticeship · 2 years

Lille, France

DevSecOps

September 2022 - September 2023

Benchmarked security tools (Snyk, Veracode, Checkmarx). Integrated Snyk into CI/CD, monitored and remediated vulnerabilities, and scanned Docker images with Grype and Trivy.

Web Developer

September 2021 - September 2022

Created an internal npm package in Svelte.js for Decathlon’s e-commerce site. Worked closely with PMs, DevOps, UI/UX, and developers for unified experience.