Célestin Matte

DevOps System Administrator

contact@cmatte.me
https://cmatte.me
https://github.com/Perdu
35 years old
Strasbourg, France

Education

2017

PhD in Computer Science, INSA Lyon, University of Lyon, France.
2014

Master (Diplôme d'ingénieur) at Ensimag, Grenoble INP. Semester in Aalto University (Finland).
2011

DUT in computer sciences in Metz, valedictorian. Semester in Germany.

Professional experience

2020 - now

Freelance DevOps & System Administrator

Worked with multiple clients, including:
- 2021 - now
  (part time)
  Software in the Public Interest
  - Migrated production systems (websites, mailing lists, email servers) to GCP and AWS
  - Implemented monitoring, backup, and security measures for production infrastructure
  - Automated deployments and system configuration with Ansible. Public example: Ansible-PGLister
  - Reimplemented a Flask web application in Django (Python) to improve maintainability
  - Managed mail infrastructure (Exim, SPF, DKIM, DMARC) and Google Workspace integration
  - Provided support for multiple open-source projects; collaborated with maintainers on patches and bug reports
- 2022-02 - 09
  (80% part time)
  IRIS (Canon group)
  - Managed ~50 Linux servers (infrastructure mapping, upgrades, security hardening)
  - Resolved critical crashes and production incidents
  - Automated recurring tasks using Ansible

2014 - 2020

PhD & Postdoc at INSA Lyon & Inria

Researched privacy, Wi-Fi & Web tracking, GDPR compliance; published 7 articles (1 top-ranked conference)
Built and deployed a demo Wi-Fi tracking system at public venues (Cité des Sciences, CNIL)
Automated large-scale analysis of 28,000 websites with custom Python/Selenium script
Taught computer science (3 years) and collaborated in interdisciplinary teams, including lawyers
Research cited by Google, discussed at IEEE, referenced in legal action and covered by Wired & Le Monde

2011 - 2014

Interships / Part-time jobs: Hochschule Mittweida, Digigram, TDF, CITI Laboratory.

Technical skills

- DevOps & CI/CD: Ansible, Docker, Git, Gitlab CI/CD, Bash
- Cloud: GCP, AWS, OVH, Gandi
- OS: Linux (Debian, Arch Linux, Ubuntu, CentOS)
- Web servers & databases: Apache, NGINX, PostgreSQL, MariaDB
- Monitoring & virtualization: Nagios, vSphere
- Mail infrastructure: Postfix, Exim, Dovecot, SPF/DKIM/DMARC configuration
- Programming: Python (Django, Flask)
- Infrastructure & orchestration: Kubernetes and Terraform (working knowledge)

Misc.

French (native), English (excellent), German (average).
Driving license.
Contribution to Open Source:
- Maintainer of multiple Arch Linux AUR packages
- Patches and bug reports to open source projects, including Ansible (Python), libTAS (C++), Consent-O-Matic (Javascript)
Selected personal projects:
- Managing 4 personal servers (Arch Linux/Debian), hosting web / mail / VPN / videoconferencing services (2013-now)
- Built and operated a real-time version of a game, optimizing and monitoring PHP backend performance (2020-21)
- Led dance shows, developing C/C++ software with Kinect sensors and coordinating performers (2016-2018)
- Communicated complex technical concepts to general audiences in journal articles (2015-2021)
- System administrator for student association, migrated Debian server (2012-14)
- Grehack Security Conference - Organization committee (2012 - 2015)