Senior System Engineer – Platform & Security

Testsieger.de

. Own and operate the Linux server landscape across the on-premise Proxmox/ZFS cluster and AWS .

Posted 10/2/2026full-timeRemote • PortugalSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in managing Linux server environments, particularly Debian/Ubuntu, while ensuring infrastructure security and automation through tools like Ansible. Proficient in container orchestration, CI/CD pipelines, and production MySQL administration, with strong networking knowledge and monitoring capabilities.

Highest-signal resume keywords

Linux Server AdministrationInfrastructure Security PracticesAnsible AutomationContainer OrchestrationCI/CD Pipeline Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Linux Server EnvironmentsMySQL AdministrationBash ScriptingPython ProgrammingNetworking KnowledgeInfrastructure HardeningMonitoring and LoggingCI/CD PipelinesContainer ManagementAWS Administration

Soft Skills

CollaborationCommunicationProblem-Solving

Tools & Technologies

ProxmoxZFSDockerNomadTraefikGitHub ActionsGrafanaNew RelicTerraformRabbitMQ

Industry Keywords

TCP/IPRoutingDNSLoad BalancingFirewall AdministrationVPN AdministrationZero Trust Concepts

Tech Stack

Tools & technologies

AnsibleAWSCloudDNSDockerFirewallsGrafanaKubernetesLinuxMySQLPythonRabbitMQRedisTCP/IPTerraform

About the role

Key responsibilities & impact

Own and operate the Linux server landscape across the on-premise Proxmox/ZFS cluster and AWS
Run and harden networks and security, including firewalls, VPNs, access control, certificates, hardening, and the network link to the largest partner
Automate infrastructure with Ansible and keep it versioned, reproducible, and documented
Maintain the Docker, Nomad, and Traefik container platform
Maintain GitHub Actions CI/CD pipelines so teams can ship quickly and safely
Administer MySQL in production, including backups, performance, and recovery
Extend monitoring, logging, and alerting with Grafana and New Relic
Drive incidents to root cause
Act as a sparring partner for Engineering, Data, and Product
Explain infrastructure design decisions and help grow a colleague

Requirements

What you’ll need

Several years running Linux server environments, particularly Debian/Ubuntu
Solid networking knowledge: TCP/IP, routing, DNS, load balancing, firewall and VPN administration
Proven infrastructure security practice: hardening, access control, and security best practices
Production experience with Ansible
Experience with container orchestration such as Nomad, Kubernetes, or similar
Experience with CI/CD pipelines
Experience with AWS or a comparable public cloud
Production MySQL administration experience
Bash and Python for tooling
Monitoring, logging, and troubleshooting expertise
Fluent English
German is a plus, not a requirement
Terraform, RabbitMQ, Redis, and Zero Trust concepts are pluses

Benefits

Comp & perks

Attractive salary
Full technical ownership of a real hybrid stack (on-premise + cloud)
Ownership culture with short paths and direct access to the CEO
Modern technology stack including Proxmox, AWS, Ansible, Nomad, Docker, MySQL, Python, GitHub Actions, and Next.js ecosystem
Remote work from Portugal
Regular visits to Osnabrück
Established engineering team in Portugal