Senior Linux & Network Administrator

9D Technologies is at the forefront of mobile apps and games publishing, delivering innovative and engaging experiences to users worldwide. Our mission is to create extraordinary digital experiences that captivate and entertain, and we are committed to pushing the boundaries of creativity and technology utilizing AI.

We are hiring a Senior Linux and Network Administrator to own production Linux servers and network services: maintenance, new builds, incidents, and research.

• →Own configuration and rollout of Linux network services, with a rollback path.
• →Own WireGuard, RADIUS (FreeRADIUS), LDAP, KanIDM, and Active Directory–style directory services, including groups, credentials, and replication.
• →Design Ansible changes for new hosts and services; manage DNS, TLS, and firewall policy.
• →Lead investigation when authentication, connectivity, or capacity issues have no known cause.
• →Own alerting, telemetry, and log and event review (Prometheus, Grafana, syslog).
• →Run vulnerability assessment on the server fleet and verify remediation.
• →Build proofs of concept, recommend what should reach production, and keep the runbooks current.

• A bachelor’s degree in Computer Science or a closely related field.
• 4–6 years in Linux system administration and network operations, including ownership of production changes.
• Production experience with RADIUS and a directory service (KanIDM, LDAP, or Active Directory), plus WireGuard or equivalent tunnel operations.
• Strong Ansible, monitoring, and vulnerability remediation on Linux servers.