Senior Site Reliability Engineer

Hornetsecurity

. Design, build, and operate reliable, scalable infrastructure for internal product teams .

Posted 11/10/2026full-timeHem • FranceSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates strong expertise in Linux Administration and Infrastructure Engineering, with a focus on building and managing scalable systems. Proficient in CI/CD practices, monitoring, and automation tools to enhance production reliability and performance.

Highest-signal resume keywords

Linux AdministrationInfrastructure EngineeringCI/CD Pipeline DevelopmentKubernetes ManagementMonitoring and Observability

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Linux ExpertiseInfrastructure ArchitectureTroubleshootingAutomation ToolsScriptingService Reliability PrinciplesTechnical OwnershipPerformance OptimizationScalability ChallengesProduction Operations

Soft Skills

Proactive MindsetSolution-OrientedGood Communication Skills

Tools & Technologies

PuppetTerraformGitLabArgo CDIcingaElastic StackJiraConfluence

Industry Keywords

Site Reliability EngineeringInfrastructure ManagementCloud EnvironmentsGitOpsVirtualization

Tech Stack

Tools & technologies

AnsibleCloudKubernetesLinuxPuppetTerraform

About the role

Key responsibilities & impact

Design, build, and operate reliable, scalable infrastructure for internal product teams
Take technical ownership from initial requirements to production
Make key technical decisions and improve existing systems
Address performance, scalability, and reliability challenges
Manage Linux infrastructure using Puppet and scripting
Build CI/CD pipelines with GitLab
Work with Kubernetes, Argo CD / GitOps, and Terraform
Define service objectives (SLIs/SLOs) and improve production readiness
Identify potential issues before they affect customers
Improve monitoring, alerting, and troubleshooting using Icinga and the Elastic Stack
Collaborate with developers and other engineering teams
Share best practices and contribute to technical discussions and decisions
Participate in the on-call rotation and investigate incidents
Drive long-term production improvements

Requirements

What you’ll need

5–10 years of experience in Linux administration, infrastructure engineering, SRE, or a similar technical role
Strong Linux expertise and a solid understanding of infrastructure architecture, troubleshooting, and production operations
Experience taking technical ownership of infrastructure or platforms, beyond day-to-day administration
Hands-on experience with automation and infrastructure tools, ideally Puppet, Ansible, scripting, or Terraform
Familiarity with Kubernetes, CI/CD, GitOps, virtualization, or private cloud environments
Understanding of monitoring, observability, backup, and service reliability principles
A proactive, solution-oriented mindset, with the ability to challenge existing approaches and suggest practical improvements
Good communication skills in French and English
Nice to have: Experience with GitLab CI/CD, Argo CD, Icinga, Elastic Stack, Jira/Confluence, or AI-assisted engineering tools

Benefits

Comp & perks

Permanent contract (CDI - Contrat à Durée Indéterminée)
5 weeks of statutory paid vacation + RTT
€10 meal vouchers, with €5.92 covered by Hornetsecurity
100% coverage of public transportation costs
Health and life insurance coverage (Axa)
Subsidized sports and wellness programs
Access to an inter-company daycare
International exchange program
Executive status
Fixed-hours arrangement
Training on internal systems and processes