{"schemaVersion":"jobsearcher.job.v1","id":"f8d035c2ef03e6c1f39711cd","url":"https://jobsearcher.com/jobs/f8d035c2ef03e6c1f39711cd","canonicalUrl":"https://jobsearcher.com/jobs/f8d035c2ef03e6c1f39711cd","title":"Linux System Engineer","description":"Systems Engineer - LinuxCore ResponsibilitiesHigh-Density Infrastructure ManagementManage and optimize a mixed fleet of Ubuntu and RHEL servers, maintaining high availability for large volumes of concurrent remote sessionsOversee secure handoffs between RDP gateways and backend SSH environmentsConfigure and tune Nginx as a high-performance reverse proxy and load balancer under peak traffic conditionsMonitor and tune the Linux networking stack (TCP/IP limits, file descriptors, socket buffers) to prevent bottlenecks in high-density session environmentsCritical Services & Messaging OperationsManage Postfix mail queues for transactional messaging and internal relay operationsSupport enterprise-scale printing via CUPS, resolving driver conflicts and spooling issues across a distributed environmentSecurity & HardeningApply security best practices across Ubuntu and RHEL fleets using SELinux, AppArmor, and firewall configurations to maintain a defense-in-depth postureHarden SSH configurations and access entry points to limit lateral movement riskData Integration SupportMonitor and maintain outbound data feed replication from Linux-based systems to Microsoft SQL Server environmentsEnsure the integrity of automated ETL scripts and data pipelines across heterogeneous systemsQualificationsStrong hands-on experience administering Ubuntu and RHEL in high-concurrency production environmentsProficiency with Nginx, Linux kernel and network tuning, and SSH hardeningWorking knowledge of Postfix, CUPS, SELinux, and AppArmFamiliarity with ETL pipelines and SQL Server replicationStrong diagnostic instincts and a methodical approach to troubleshooting","company":"Phoenix Group","rawCompany":"phoenix group","city":"Yonkers","state":"NY","isRemote":false,"isActive":false,"createdAt":"2026-07-14T07:39:07.743Z","occupations":[{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1244.00","title":"Network and Computer Systems Administrators","slug":"network-and-computer-systems-administrators"},{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"518210","title":"Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services","slug":"computing-infrastructure-providers-data-processing-web-hosting-and-related-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Linux System Engineer","description":"Systems Engineer - 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