Linux Systems Engineer

Maintenance of a virtualization environment (Proxmox) and administration of virtual servers Administration of Linux-based systems (RHEL); FreeBSD knowledge is a plus Operation, maintenance and further development of our infrastructure (services, networking, monitoring and alerting) Deployment and maintenance of containerized applications Management of our CI/CD infrastructure (GitLab CI) in collaboration with our developers Participation in 7×24 on-call duty

Threema is the world’s best-selling secure messenger for both private users and businesses. Since 2012, we have been working tirelessly to ensure that our users can communicate freely without worrying about their privacy. Our growing user base includes millions of private customers and thousands of businesses and organizations from all over the world.

• At least 5 years of professional experience in a similar role

• Experience with server virtualization

• Expertise in IT security (VPN, firewall, system hardening, etc.)

• Experience with installation, configuration, and troubleshooting of Linux-based systems

• Knowledge of automation and config-as-code solutions

• Experience with monitoring solutions

• Experience with OCI containers (Docker, Podman) and ideally experience with container orchestration

• Experience with databases such as MySQL or PostgreSQL is a plus

• Experience with managing CI/CD infrastructure (especially GitLab CI) is a plus

• High level of awareness with regards to IT security and privacy

• Strong sense of responsibility and attention to detail

• Willingness to learn new technologies and concepts

• Good written and spoken German and English (at least B2)