Nicolas Béguier
CISO @ 52 Entertainment · Security Architect · Co-Founder @ Tandem Technology
CISO @ 52 Entertainment · Security Architect · Co-Founder @ Tandem Technology
Monitor External Exposure with Subdomain Analysis Toolkit
May 3, 2026
Two Effective Ways to Intercept Android App Traffic
May 5, 2023
Secure Your Nginx Server
May 2, 2026
Secure Your Apache Server
May 2, 2026
Enhancing vulnerability prevention through human-based security measures
Apr 28, 2023
The SPLC vs. SDLC: What Changes for Product Security?
Dec 10, 2022
Security Post-it #3 – Volatility Linux Profiles
Mar 15, 2021
Salaires cybersécurité à Paris en 2026
May 2, 2026
CryptographySymmetrical, Asymmetrical & Hashing Encryption
Dec 16, 2022
DevSecOpsCode Security Showdown: shhgit vs. gitleaks
Dec 11, 2022
ArchitectureZero Trust Architecture: A Comprehensive Guide
Dec 10, 2022
DevSecOpsSecurity Post-it #8 – Software Security Testing for Android and iOS
Nov 22, 2022
DevSecOpsSecurity Post-it #7 – Software Security Testing for Golang
Nov 22, 2022
DevSecOpsSecurity Post-it #6 – Software Security Testing for JS & TS
Nov 3, 2022
DevSecOpsSecurity Post-it #5 – Looking for secrets
Oct 31, 2021
PentestSecurity Post-it #4 – XSS with <style>
May 11, 2021
ForensicsSecurity Post-it #2 – Volatility × Gimp
Mar 8, 2021
Web SecurityKoaJS Security Tips
Dec 30, 2019
CryptographySecurity Post-it #1 – SHA-1 is broken, not HMAC
Dec 13, 2019
CISO · 52 Entertainment ● Now
Jul 2023 – Present
Built security from scratch across 7 entities, 4 countries, 270 people and 37M MAU. EDR, governance, 15+ annual app audits, awareness programs.
Co-Founder · Tandem Technology ● Now
Jul 2022 – Present
Web app audits, smart contract and ZK protocol security reviews for Web3 clients.
Security Architect · leboncoin
Apr 2022 – Jul 2023
Security design, threat monitoring, forensics, incident response, developer training.
Offensive & Defensive Security Engineer · leboncoin
Oct 2019 – Apr 2022
Web/mobile pentesting, defensive tooling, forensics, incident response.
Site Reliability Engineer · leboncoin
Mar 2017 – Oct 2019
Infrastructure (OpenNebula, Kubernetes), IAM, OAuth2 SSO, CASSH, NIDS.
System Engineer · Ministère de la Défense
Apr 2013 – Mar 2017
Multi-datacenter infrastructure, Puppet automation, monitoring.
