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Senior Systems Engineer – Platform & Security
Testsieger.de. Operate the Linux server environment, including on-premises clusters (Proxmox, ZFS) and AWS .
Core Competencies
Role fitCore Competencies
Use this summary to align your resume positioning with the role.
Demonstrates expertise in operating and securing Linux server environments, managing container platforms, and automating infrastructure with tools like Ansible. Proficient in network management, CI/CD pipelines, and database administration, with strong problem-solving and communication skills.
Highest-signal resume keywords
Linux Server AdministrationInfrastructure SecurityContainer OrchestrationCI/CD Pipeline ManagementMySQL Administration
ATS Keywords
Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills
Linux Server EnvironmentsNetworking ExpertiseAnsible AutomationContainer ManagementCI/CD PipelinesMySQL AdministrationBash ScriptingPython ScriptingMonitoring and LoggingIncident Analysis
Soft Skills
CommunicationCollaboration
Tools & Technologies
ProxmoxZFSAWSDockerNomadTraefikGitHub ActionsGrafanaNew RelicTerraform
Industry Keywords
TCP/IPRoutingDNSLoad BalancingFirewall AdministrationVPN AdministrationAccess ControlSecurity Best PracticesZero-Trust Concepts
Tech Stack
Tools & technologiesAnsibleAWSCloudDNSDockerFirewallsGrafanaKubernetesLinuxMySQLPythonRabbitMQRedisTCP/IPTerraform
About the role
Key responsibilities & impact- Operate the Linux server environment, including on-premises clusters (Proxmox, ZFS) and AWS
- Operate and harden networks and security infrastructure, including firewalls, VPNs, access control, certificates, and system hardening
- Manage network connectivity with the largest partner
- Automate infrastructure with Ansible, including version control, reproducibility, and documentation
- Manage the container platform (Docker, Nomad, Traefik)
- Manage CI/CD pipelines with GitHub Actions
- Administer MySQL in production, including backups, performance, and recovery
- Expand monitoring, logging, and alerting with Grafana and New Relic
- Conduct incident analyses through to root cause
- Act as a sparring partner for Engineering, Data, and Product
- Explain technical architecture decisions
Requirements
What you’ll need- Several years of experience operating Linux server environments (Debian/Ubuntu)
- Strong networking expertise: TCP/IP, routing, DNS, load balancing, firewall and VPN administration
- Demonstrable experience in infrastructure security: hardening, access control, and security best practices
- Production experience with Ansible
- Experience with container orchestration (Nomad, Kubernetes, or comparable technologies)
- Experience with CI/CD pipelines
- Experience with AWS or a comparable public cloud platform
- Production experience administering MySQL
- Bash and Python for tooling
- Experience with monitoring, logging, and troubleshooting
- A plus: Terraform, RabbitMQ, Redis, and zero-trust concepts
- Good written and spoken English
Benefits
Comp & perks- Full technical responsibility for a genuine hybrid stack (on-premises and cloud)
- On-call duty is compensated and shared across the team
- Ownership culture with short decision-making paths: you work directly with company leadership
- Modern technology stack: Proxmox, AWS, Ansible, Nomad, Docker, MySQL, Python, GitHub Actions, and the Next.js ecosystem
- Hybrid work based in Osnabrück