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

<p>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.</p> <p>Testsieger is one of Germany&#39;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.<br>You will be the technical owner of our infrastructure – with a colleague at your side whom you&#39;ll grow, and an engineering team that counts on you.</p> <h2 id="tasks">Tasks</h2> <ul> <li>Own the operation of our Linux server landscape: on-premise cluster (Proxmox, ZFS) and AWS</li> <li>Run and harden network and security: firewalls, VPN, access control, certificates, hardening – including the network link to our largest partner</li> <li>Automate with Ansible and keep infrastructure versioned, reproducible and documented</li> <li>Maintain our container platform (Docker, Nomad, Traefik) and CI/CD pipelines (GitHub Actions) so teams ship fast and safely</li> <li>Administer MySQL in production: backups, performance, recovery</li> <li>Extend monitoring, logging and alerting (Grafana, New Relic) and drive incidents to root cause</li> <li>Act as sparring partner for Engineering, Data and Product – and explain why things are built the way they are</li> </ul> <h2 id="requirements">Requirements</h2> <ul> <li>Several years running Linux server environments (Debian/Ubuntu) – you know how to get systems from A to B without assistance</li> <li>Solid networking: TCP/IP, routing, DNS, load balancing, firewall and VPN administration</li> <li>Proven infrastructure security practice: hardening, access control, security best practices</li> <li>Ansible in production, container orchestration (Nomad, Kubernetes or similar), CI/CD pipelines</li> <li>Experience with AWS or a comparable public cloud</li> <li>MySQL administration in production</li> <li>Bash and Python – for tooling, not just one-liners</li> <li>Monitoring, logging and troubleshooting are your craft, not an afterthought</li> <li>Plus: Terraform, RabbitMQ, Redis, Zero Trust concepts</li> <li>Fluent English; German is a plus, not a requirement</li> </ul> <h2 id="benefits">Benefits</h2> <ul> <li>Full technical ownership of a real hybrid stack (on-premise + cloud) – you make the decisions, not an architecture board</li> <li>Well funded company, attractive salary</li> <li>Ownership culture with short paths: you talk directly to the CEO</li> <li>Modern stack: Proxmox, AWS, Ansible, Nomad, Docker, MySQL, Python, GitHub Actions, Next.js ecosystem</li> <li>Remote from Portugal, with regular visits to Osnabrück and colleagues already based in Portugal</li> </ul> <p>If you see infrastructure as your product and want to develop it with real responsibility – apply now. We&#39;re looking forward to meeting you.</p>