System Administrator

Role & responsibilities

• Manage and maintain Linux servers across production, staging, development and experimental environments.
• Keep infrastructure organized, documented and reproducible, including server inventory, access credentials, DNS, certificates, networking and service ownership.
• Deploy, configure and maintain Docker-based applications, databases, reverse proxies and supporting services.
• Implement monitoring, alerting, logging and uptime checks across all critical systems.
• Establish and maintain reliable backup, restore and disaster-recovery procedures, including regular recovery testing.
• Manage operating-system updates, security patches, SSH access, firewalls and server hardening.
• Automate repetitive administration work using tools such as Ansible, Terraform, shell scripting or equivalent.
• Maintain clear separation between production systems and experimental/development infrastructure.
• Monitor disk usage, memory, CPU, network traffic and infrastructure costs and proactively resolve issues.
• Troubleshoot server, networking, deployment and performance problems.
• Maintain documentation so another administrator can understand and recover the environment without relying on tribal knowledge.
• Work closely with developers while taking primary responsibility for infrastructure stability, cleanliness and operational discipline.
• Help standardize deployments and gradually eliminate manually configured or undocumented infrastructure.
• Participate in incident response and perform root-cause analysis when systems fail.
• Maintain databases and storage infrastructure, including PostgreSQL and other data services, without requiring application-development ownership.

Preferred candidate profile

• 36 years of hands-on Linux system administration, DevOps or infrastructure experience.
• Very comfortable administering Linux servers from the command line.
• Strong understanding of networking, DNS, TLS/SSL, SSH, firewalls, HTTP and reverse proxies.
• Practical experience with Docker and containerized production environments.
• Experience with Nginx, Caddy, HAProxy or similar technologies.
• Good understanding of backups, replication, disaster recovery and infrastructure security.
• Experience with monitoring tools such as Prometheus, Grafana, Uptime Kuma, Zabbix or similar.
• Familiarity with infrastructure automation such as Ansible, Terraform or shell scripting.
• Experience managing dedicated servers, VPS providers and cloud infrastructure.
• Comfortable working with Git and CI/CD pipelines.
• PostgreSQL/Linux database administration experience is a strong advantage.
• Kubernetes experience is useful but not required.
• Strong organizational habits and an instinct for documentation, standardization and automation.
• Someone who notices an undocumented server, expiring certificate or missing backup and wants to fix it before being asked.
• Comfortable supporting a fast-moving engineering environment while being conservative and disciplined with production systems.
• We particularly value candidates who enjoy making infrastructure boring, predictable and reliable rather than constantly introducing new technologies.