Linux System Administrator

Full-stack EngineerSoftware EngineerFull TimeRemoteJuniorTeam 1,001-5,000H1B No SponsorCompany SiteLinkedIn

Location

United States

Posted

5 days ago

Salary

0

Seniority

Junior

Job Description

Linux System Administrator

Intermedia Cloud Communications

• Provision, configure, monitor, and decommission Debian-based virtual machines across Hyper-V, VMware ESXi, and OLVM environments using Cinc (Chef) and Ansible automation. • Perform routine Linux system administration, troubleshooting, and maintenance. • Participate in operating system upgrades and lifecycle management. • Develop, review, and maintain Cinc (Chef) cookbooks, Ansible playbooks, roles, data bags, and environments. • Improve infrastructure automation and configuration consistency. • Onboard servers into internal monitoring systems and Grafana. • Configure SNMP-based monitoring and alerting. • Investigate monitoring alerts and assist in resolving operational issues. • Participate in production monitoring during scheduled shifts. • Assist in operating shared infrastructure services, including: • RabbitMQ • Elasticsearch • Graylog • Grafana • Postfix mail relay clusters • BIND DNS servers • Sentry • Apply operating system and security updates through CI/CD pipelines and unattended upgrades. • Maintain firewall configurations (iptables, IP sets, F5 LTM/GTM). • Assist with TLS certificate lifecycle management using DigiCert and internal Certificate Authorities. • Participate in production incident response, disaster recovery activities, and post-incident reviews. • Help identify root causes and contribute to long-term operational improvements. • Maintain runbooks, operational documentation, knowledge base articles, and SaaS GRID documentation in Confluence. • Participate in infrastructure modernization initiatives, including: • Hypervisor migrations (VMware ESXi and Hyper-V to OLVM) • Debian major-version upgrades • Legacy platform migrations • Data center consolidation and decommissioning

Job Requirements

  • Bachelor's degree in Computer Science, Information Technology, or a related technical field, or equivalent practical experience.
  • 1–4 years of hands-on Linux systems administration experience (Debian or Ubuntu preferred).
  • Solid understanding of Linux fundamentals, including:
  • systemd
  • networking (VLANs, DNS, NTP)
  • filesystems
  • user and group management
  • LDAP authentication
  • Experience with at least one configuration management platform (Ansible or Chef/Cinc).
  • Familiarity with virtualization platforms such as Hyper-V, VMware ESXi, or KVM/OLVM.
  • Basic Bash scripting skills and the ability to understand and modify existing Python scripts.
  • Understanding of web servers and reverse proxies, particularly Nginx.
  • Basic knowledge of TLS/SSL certificate management.
  • Experience using Git for source control and code reviews.
  • Ability to work in production environments while following change management procedures.
  • Good written English skills for documentation and collaboration across distributed teams.

Benefits

  • Operating System | Debian
  • Virtualization | Hyper-V, VMware ESXi, OLVM
  • Configuration Management | Cinc (Chef), Ansible
  • Web Services | Nginx, Apache
  • Containers | Docker
  • Messaging | RabbitMQ
  • Search & Logging | Elasticsearch, Graylog
  • Monitoring | Grafana, Telegraf, SNMP
  • Mail | Postfix
  • DNS | BIND
  • Load Balancing | F5 LTM/GTM, A10
  • Security | iptables, IP sets, Qualys, Splunk, Falcon, DigiCert, Internal CA
  • Package Repositories | Sonatype Nexus, Aptly, Artifactory
  • Databases | Percona MySQL, H2
  • CI/CD | TeamCity, GitLab
  • Collaboration | Confluence, ServiceNow, Redmine

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