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Administrateur Système Linux (Senior)

SII Group

Missions :

Nous recherchons un(e) Administrateur(trice) Linux Senior pour rejoindre une équipe d’experts en administration de systèmes Unix/Linux de niveau 3. Dans un environnement Agile, la personne contribuera au maintien, à l’évolution et à la sécurisation d’infrastructures critiques. Elle travaillera en étroite collaboration avec les équipes techniques afin d’assurer la stabilité, la performance et l’automatisation des plateformes Linux.

Responsabilités :

  • Assurer l’administration avancée des environnements Linux Red Hat Enterprise.
  • Améliorer les outils et processus liés à l’installation, à la configuration et à la gestion des serveurs Linux.
  • Accompagner les équipes de développement dans la définition et l’évolution de leurs architectures techniques tout en respectant les normes de sécurité et les standards établis.
  • Assurer la gestion des incidents, des problèmes et des évolutions des produits maintenus par l’équipe.
  • Participer à l’analyse et à la résolution des incidents de production.

Automatisation et développement :

  • Concevoir, développer et maintenir des processus d’automatisation.
  • Recueillir les besoins fonctionnels des différentes équipes d’infrastructure.
  • Traduire les besoins en spécifications techniques et assurer leur validation auprès des experts concernés.
  • Développer des API et des outils d’automatisation en Python.
  • Collaborer avec les équipes serveurs, stockage et sauvegarde afin de renforcer les capacités d’automatisation.

Gestion des accès et des identités :

  • Participer à la maintenance et à l’évolution de solutions de gestion des utilisateurs, des groupes et des privilèges (sudoers).
  • Collecter et analyser les données provenant des comptes locaux sur des serveurs Linux et Windows.
  • Assurer l’amélioration continue de l’infrastructure de collecte de données, notamment au niveau de l’architecture, de la sécurité, de la documentation et de l’extension du périmètre fonctionnel.
  • Investiguer et résoudre les incidents liés à la collecte de données.

Gestion du cycle de vie des systèmes Linux :

  • Gérer le cycle de vie des systèmes d’exploitation Linux.
  • Réaliser les opérations régulières de mise à jour et de correction des modèles de systèmes dans des environnements virtualisés VMware ou physiques (bare metal).
  • Maintenir les conditions opérationnelles et de sécurité des plateformes.
  • Assurer une veille technologique sur les enjeux d’obsolescence.
  • Maintenir à jour la documentation technique associée.

Profil recherché :

  • Diplôme universitaire en informatique, génie logiciel ou expérience équivalente.
  • Solide expertise en administration de systèmes Linux.
  • Excellente capacité d’analyse et de résolution de problèmes complexes.
  • Bonne compréhension des architectures logicielles distribuées.
  • Expérience en automatisation et en développement de scripts.
  • Maîtrise de Python et des technologies associées à l’automatisation.
  • Connaissance de PostgreSQL et FastAPI.
  • Excellentes aptitudes en communication et en collaboration.
  • Expérience dans un rôle d’expert Linux.
  • Expérience dans un environnement Agile.

Mission :

We are seeking a Senior Linux Administrator to join a Level 3 Unix/Linux Systems Administration team. Working within an Agile environment, the successful candidate will contribute to the maintenance, evolution, automation, and security of critical infrastructure while collaborating closely with technical stakeholders to ensure stable, efficient, and secure Linux platforms.

Responsibilities:

  • Provide advanced administration and support for Red Hat Enterprise Linux environments.
  • Improve tools and processes related to Linux server installation, configuration, and management.
  • Support development teams in defining and evolving technical architectures while ensuring compliance with security standards and best practices.
  • Manage incidents, problem resolution, and platform enhancements.
  • Participate in production support activities and incident analysis.

Automation and Development:

  • Design, develop, and maintain infrastructure automation processes.
  • Gather functional requirements from infrastructure teams.
  • Translate business and technical requirements into technical specifications.
  • Develop APIs and automation tools using Python.
  • Collaborate with server, storage, and backup teams to expand automation capabilities.

Identity and Access Management:

  • Maintain and enhance solutions used to manage users, groups, and privileged access (sudoers).
  • Collect and analyze local account data from Linux and Windows servers.
  • Continuously improve the data collection infrastructure, including architecture, security, documentation, and functional scope expansion.
  • Investigate and resolve data collection incidents.

Linux Lifecycle Management:

  • Manage the Linux operating system lifecycle.
  • Perform regular patching and updates of operating system templates across VMware virtualized and bare-metal environments.
  • Ensure operational stability and security compliance.
  • Monitor technology obsolescence and recommend improvements.
  • Maintain related technical documentation.

Required profile:

  • Bachelor's degree in Computer Science, Software Engineering, or equivalent professional experience.
  • Strong expertise in Linux system administration.
  • Excellent analytical and troubleshooting skills.
  • Solid understanding of distributed software architectures.
  • Experience with scripting, automation, and infrastructure engineering.
  • Proficiency in Python and related automation technologies.
  • Knowledge of PostgreSQL and FastAPI.
  • Strong communication and teamwork skills.
  • Previous experience in a Linux expert or senior Linux administration role.
  • Experience working in Agile environments.
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Vacancy posted 15 hours ago
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