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

Testsieger Portal AG; Osnabrück; Hybrid; Vertraulich; Vollzeit

Benefits dieser Stelle

Full ownership of tech stack

Competitive salary

Direct access to CEO

Modern tech stack

Remote from Portugal

Zusammenfassung

Testsieger Portal AG seeks a technical owner for our Linux/server landscape, spanning on-prem Proxmox and AWS. You will secure, automate, and scale our hybrid stack, including Docker/Nomad/Traefik, CI/CD with GitHub Actions, and MySQL production operations.

You will collaborate with Engineering, Data and Product, discussing architectural decisions, and mentor a teammate. Fluent English required; German a plus. Remote from Portugal with visits to Osnabrück.

Qualifikationen

• Several years running Linux server environments (Debian/Ubuntu).
• 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 as core craft.
• Plus: Terraform, RabbitMQ, Redis, Zero Trust concepts
• Fluent English; German is a plus, not a requirement

Aufgaben

• 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

Kenntnisse

Linux servers

Networking

Security best practices

Ansible in prod

Container orchestration

AWS

MySQL in prod

Bash & Python

Monitoring & troubleshooting

Terraform

RabbitMQ

Redis

Zero Trust concepts

Fluent English

Tools

Docker

Nomad

Kubernetes

Traefik

GitHub Actions

Proxmox

ZFS

Terraform

Jobbeschreibung

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

• 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

• 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

• 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