Freelancer profile translated to English.
Back to original languageAbout Célestin
Independent DevOps system administrator specializing in Linux infrastructure, I deploy and migrate systems using Ansible to GCP, AWS, and internal infrastructures, ensuring automation, traceability, and documentation.
I improve system resilience through monitoring, redundancy, and automated redeployment. I also enjoy the challenge of modernizing and documenting legacy infrastructures.
With an engineering degree, a PhD in computer science (privacy/network), and over 10 years of experience in Linux infrastructure maintenance, I work autonomously and efficiently in international environments. I have been a full-time system administrator for 5 years.
Services:
- infrastructure automation,
- system monitoring,
- backup and disaster recovery strategies,
- cloud migration,
- service setup (web, mail, videoconferencing, VPN, etc.),
- infrastructure modernization,
- CI/CD pipeline design and implementation,
- maintenance,
- SSL/TLS certificate management.
Open to other projects.
Skills:
- DevOps & CI/CD: Ansible, Docker, Git, Gitlab CI/CD, Bash
- Cloud: GCP, AWS, OVH, Gandi
- Operating systems: 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
- Python programming (Django, Flask)
- Infrastructure & orchestration: Kubernetes and Terraform (notions)
Strasbourg (France) & remote
French
Native or bilingual
English
Native or bilingual
German
Conversational
Can work on-site
Strasbourg (up to 20km)
Experience
- Software in the Public Interest (SPI)DevOps SysadminTECHJuly 2021 - Today (5 years)Migration of existing systems to properly maintained cloud solutions:- Migration of systems to Google Cloud Engine and AWS:- websites- mailing lists (mailman)- mail servers (postfix/exim)- Migration of Git servers from gitolite to Gitlab.- Configuration of Google Workspace.- Transfer of DNS zones from Mythic Beasts to Gandi, communication with associated projects.- Addition of monitoring and backup solutions.- Writing documentation.- Rewriting a Flask web application in Django.- Writing an Ansible script for installing the pglister mailing list software, working with the upstream team to integrate patches.- Configuration of SPF, DKIM, and DMARC.- Implementation of deployment testing for the CI pipeline of PGLister and PGArchives.International context (US client).
- IRIS (By CANON)System administratorTECHFebruary 2022 - September 2022 (7 months)Maintenance of ~50 Linux servers:- Update of all servers- Implementation of security measures- Debugging issues and emergency intervention for critical crashes- Introduction of automation with Ansible- Update of documentation- Communication with teams
- InriaPostdoctoral ResearcherRESEARCHMarch 2019 - February 2020 (1 year)Nice, FrancePrivacy - Web Tracking. I identified legal issues in cookie banners using IAB Europe's Transparency & Consent Framework, and in the definition of data processing purposes within this framework.Several publications including one at an A* ranked conference.Development of a web crawling tool and a browser extension (WebExtensions)https://www-sop.inria.fr/members/Nataliia.Bielova/cookiebanners/
Reviews
David
DBCONSEILS
Reviewed on 10/17/2024
Thierry
Thierry Templier
Reviewed on 12/17/2020
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Education
- PhDINSA Lyon2017Doctorat en informatique : réseau / vie privée Thèse : Traçage Wi-Fi : Attaques par Prise d'Empreinte et Contre-Mesures Manuscrit : https://hal.inria.fr/tel-01659783v1 Slides : https://cmatte.me/docs/slides_these.pdf
- Master's degree in Computer Science and Applied MathematicsEnsimag - National School of Computer Science and Applied Mathematics of Grenoble2014