Freelancer profile translated to English.
Back to original languageAbout Jonathan
I've been coding in Go and Rust for several years. A Discord security SaaS in production, a Unix shell from scratch, a Proxmox infrastructure with reverse proxy, VPN, and monitoring running at home. When something breaks at 2 am, I diagnose and fix it.
What interests me is cybersecurity and everything related to low-level systems. I regularly participate in CTFs on HackTheBox and Root-Me, not for the resume, but because it's what drives me. This is reflected in my coding style: I seek to understand what's really happening under the hood rather than piling up abstractions.
I offer services in backend development, DevSecOps, automation, and security tooling. If you're looking for someone who knows what they're doing at the system level and delivers, we can work together.
French
Native or bilingual
English
Fluent
Spanish
Basic
Can work on-site
Aix-en-Provence (up to 30km)
Experience
- Projet personnelDeveloper & System AdministratorTECHJanuary 2026 - Today (5 months)Aix-en-Provence, FranceManaged a personal infrastructure under Proxmox (two virtualization nodes) with several services in production: WireGuard VPN, Nginx reverse proxy, Cloudflare tunnels, PostgreSQL databases. Set up CI/CD pipelines with Docker Compose. Daily Linux administration and incident management in real-world conditions
- Projet personnelGo Developer | SaaS Security BotSOFTWARE PUBLISHINGJanuary 2026 - Today (5 months)Aix-en-Provence, FranceDeveloped a Discord security bot from scratch in Go, deployed in production on personal infrastructure via Docker Compose and Cloudflare Tunnel. Features: risk engine with decay/TTL, alternative account detection, ticketing system, web dashboard with Go templates, multi-language internationalization (fr/en/es). Multi-server architecture with PostgreSQL database.
- Projet personnelRust Developer | Unix ShellSOFTWARE PUBLISHINGJanuary 2026 - Today (5 months)Aix-en-Provence, FranceDeveloped a complete Unix shell from scratch in Rust, organized in a Cargo workspace with three crates: shell-core, shell-cli, and orbisbox. Implemented a custom parser, a three-node AST, process management (fork/exec/dup2), job control (WNOHANG/tcsetpgrp), redirections, pipes, and about forty integrated Unix utilities.
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Education
- Bachelor 2 CybersecurityAix Ynov CampusCybersécurité offensive et défensive, administration systèmes et réseaux, développement, cryptographie, forensics, gestion des incidents, projets groupe