(Senior) DevOps Engineer - Infrastructure & Security (m/f/d)

Do you want to own infrastructure rather than just keep it running? Here, the full stack is yours – from the Proxmox cluster in our own data center, through firewalls and VPNs, to AWS and the deployment pipelines.

Testsieger is one of Germany's largest consumer platforms: 4\.2 million products, test reviews, customer ratings and an integrated price comparison that guides millions of users to the right purchase. A team of 20 with short decision paths and no corporate overhead – and an established engineering team in Portugal.

You will be the technical owner of our infrastructure – with a colleague at your side whom you'll grow, and an engineering team that counts on you.

Tasks
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• Own the operation of our Linux server landscape: on\-premise cluster (Proxmox, ZFS) and AWS


• Run and harden network and security: firewalls, VPN, access control, certificates, hardening – including the network link to our largest partner


• Automate with Ansible and keep infrastructure versioned, reproducible and documented


• Maintain our container platform (Docker, Nomad, Traefik) and CI/CD pipelines (GitHub Actions) so teams ship fast and safely


• Administer MySQL in production: backups, performance, recovery


• Extend monitoring, logging and alerting (Grafana, New Relic) and drive incidents to root cause


• Act as sparring partner for Engineering, Data and Product – and explain why things are built the way they are

Requirements
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• Several years running Linux server environments (Debian/Ubuntu) – you know how to get systems from A to B without assistance


• Solid networking: TCP/IP, routing, DNS, load balancing, firewall and VPN administration


• Proven infrastructure security practice: hardening, access control, security best practices


• Ansible in production, container orchestration (Nomad, Kubernetes or similar), CI/CD pipelines


• Experience with AWS or a comparable public cloud


• MySQL administration in production


• Bash and Python – for tooling, not just one\-liners


• Monitoring, logging and troubleshooting are your craft, not an afterthought


• Plus: Terraform, RabbitMQ, Redis, Zero Trust concepts


• Fluent English; German is a plus, not a requirement

Benefits
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• Full technical ownership of a real hybrid stack (on\-premise \+ cloud) – you make the decisions, not an architecture board


• Well funded company, attractive salary


• Ownership culture with short paths: you talk directly to the CEO


• Modern stack: Proxmox, AWS, Ansible, Nomad, Docker, MySQL, Python, GitHub Actions, Next.js ecosystem


• Remote from Portugal, with regular visits to Osnabrück and colleagues already based in Portugal

If you see infrastructure as your product and want to develop it with real responsibility – apply now. We're looking forward to meeting you.

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