(Sr.) Linux / DevOps Engineer (f/m/d)

Zertificon Solutions GmbH

IT-Sicherheit

Berlin

Art der Beschäftigung: Vollzeit
58.000 € – 72.500 € (von XING geschätzt)
Hybrid
Zu den Ersten gehören

Über diesen Job

(Sr.) Linux / DevOps Engineer (f/m/d)

Berlin

Zertificon Solutions – Software Manufacturer since 2004.
We are IT security specialists: our products encrypt business communications. More than 25% of the 100 highest-revenue companies in Germany, as well as hundreds of medium-sized enterprises across all industries, already use our Z1 encryption solutions. We have big plans and continue to grow steadily. Nearly 140 employees are already working with us in Neukölln. Join our professional, highly qualified team: take on challenges, share your knowledge, learn new things, and discover your potential!

The (Sr.) Linux / DevOps Engineer plays a pivotal role in managing Zertificon Operational Services (ZOS) platforms and environments where Zertificon products are developed, tested and run. The role ensures infrastructure health and security to guarantee smooth and uninterrupted development on our various stages. This role contributes to risk mitigation ensuring operational resilience and strengthening the company through:

Proactive maintenance and monitoring of Zertificon environments ensuring their availability and full functionality.
Maintenance of production and R&D hardware, supporting release process and troubleshooting pipelines.
Ownership and management of our R&D smart self-service solutions.

Your tasks

Infrastructure & Automation

Design, building and automated maintenance of Linux infrastructure ( Ansible, Terraform, Bash, Python)
Solve internal customer needs with infrastructure, tooling and self-service
Develop and extend CI/CD pipelines using Jenkins
Manage, troubleshoot and automate hypervisor clusters (XCP-ng)

Monitoring & Maintenance

Manage monitoring solutions (Prometheus, Grafana) and plan strategic alerts
Maintain environments: Hardware testing, installation, patches, OS, certificates, firmware

Collaboration

Contribute to a team of 4-6 by sharing knowledge
Review pull requests for scripts, playbooks, manifests to safeguard code quality

Your profile

Strong Linux knowledge
Solid network knowledge (TCP/IP, routing, proxy) and InfoSec (TLS, certificates)
Knowledge of databases (backup, restore, troubleshooting, migration)
Basic datacenter expertise with firewalls, switches, routers, cabling and servers
Solid understanding of virtualization (XCP-ng / XenServer a plus)
Strong understanding of Ansible for configuration management
Solid understanding of Jenkins CI/CD pipelines and Git
Experience with container technologies (images, registries)
Excellent English language skills and effective communication

Nice to have

Kubernetes, Docker Swarm
Work with cloud providers (Azure, AWS, Google Cloud)
Experience using Terraform

We offer

Flexible hours and home office options
Mobility: free Germany-wide public transport ticket, bike leasing, or parking
Subsidies for meals (e.g., delivery services) and home office internet
Urban Sports Club membership for flexible fitness and wellness
Office perks: rooftop terraces & green courtyard, organic fruit and drinks, personal packages accepted at the office
Get-togethers: monthly Pizza Friday, regular team events, big summer party
Responsible leadership: structured onboarding, regular feedback, clear goals
Innovative without startup risk: profitable for 20+ years, self-funded innovation with strong global potential
International team: 120+ colleagues from 30+ countries, open and collaborative culture

Join us to shape, secure and scale Zertificon’s platforms as part of a team.

About us

Why Zertificon?

Zertificon stands for securing digital business . We develop trusted IT security solutions "Made in Germany" – built for businesses that value both protection and usability.

Independent & committed: For over 20 years, we’ve built secure communication tools – as an owner-managed company with a clear stance
Purpose-driven: We believe that digital communication must be secure and free. If you think Edward Snowden did the right thing as a whistleblower, we might just share the same values. As a sign of our support, we donate €1,000 to an organization that supports Edward Snowden for every new hire who mentions him in their application
Hands-on excellence: We take on complex challenges because we can. Our in-house experts are top-tier – even external specialists often learn from us. When we want the best, we build it ourselves
Agile by conviction: We think fast, act pragmatically, and improve continuously. No bloated processes, no "that’s just how it’s always been done.” Initiative is welcome – but of course, it will be challenged, and not every idea will make it through unchallenged
Security that works: We build software that’s not only secure, but actually usable – not just for large enterprises with dedicated highly skilled IT teams, but also for small and mid-sized businesses that need strong security without the complexity
Diverse & international: Our team of 130 people from 30+ countries shares one mission: making secure digital communication easily accessible to businesses of all sizes

If that resonates with you, we’d love to hear from you.