Senior Linux & Network Administrator

About the role

9D Technologies, a mobile apps and games publisher, is hiring a Senior Linux and Network Administrator to own production Linux servers and network services, covering maintenance, new builds, incidents and research.

Key responsibilities

• Own the configuration and rollout of Linux network services, with a rollback path
• Manage WireGuard, RADIUS (FreeRADIUS), LDAP, KanIDM and Active Directory-style directory services, including groups, credentials and replication
• Design Ansible changes for new hosts and services, and manage DNS, TLS and firewall policy
• Investigate authentication, connectivity and capacity issues with no known cause
• Review alerts, telemetry, logs and events (Prometheus, Grafana, syslog)
• Run vulnerability assessments on the server fleet and verify remediation
• Build proofs of concept, recommend what reaches production and keep runbooks current

Required profile

• 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
• Experience with RADIUS and a directory service (KanIDM, LDAP or Active Directory), plus WireGuard or equivalent tunnel operations

Required skills

• Strong Ansible, monitoring and vulnerability remediation on Linux servers
• Linux system administration and network operations

What we offer

• Competitive pay matching skills and experience
• Family health insurance
• Paid time off
• On-site fitness facilities and meals provided