L3 Linux System Engineer

Job Description Roles & Responsibilities Handle complex technical issues escalated from L1 and L2 support teams. Troubleshoot advanced Linux, server, network, cloud, and application-layer issues. Perform root-cause analysis for system failures, performance problems, and security incidents. Manage and optimize Linux servers, Windows Servers, virtual machines, web servers, databases, and cloud infrastructure. Maintain high availability, reliability, and performance of critical systems. Manage and support AWS, Azure, and GCP environments. Configure and maintain web hosting platforms including Apache, Nginx, cPanel, Plesk, and WHM. Implement automation and Infrastructure-as-Code using tools such as Ansible, Terraform, Puppet, Bash, Python, or PowerShell . Support CI/CD pipelines and automated application deployments. Monitor infrastructure using tools such as Zabbix, Nagios, Prometheus, and Grafana . Analyze system and application logs using platforms such as ELK Stack and Splunk . Manage and troubleshoot networking technologies including TCP/IP, DNS, BGP, VPNs, firewalls, load balancing, and SSL/TLS. Implement and maintain infrastructure security controls, including WAF, IDS/IPS, IAM, SIEM, and DDoS protection. Perform system patching, security hardening, and vulnerability remediation. Design and maintain backup, restore, high-availability, and disaster recovery solutions. Participate in capacity planning and infrastructure scaling. Create and maintain technical documentation, SOPs, and troubleshooting guides. Collaborate with developers, network engineers, cloud engineers, and other IT teams. Mentor and provide technical training to L1 and L2 engineers. Participate in rotational on-call and emergency support when required. Desired Candidate Profile 7+ years of experience in Linux system administration, cloud hosting, IT infrastructure, or related fields. Strong hands-on experience with Linux , particularly Ubuntu, RHEL, and CentOS. Strong knowledge of Windows Server and virtualization technologies such as VMware, KVM, and Hyper-V. Experience with at least one major cloud platform: AWS, Azure, or GCP . Strong understanding of web hosting technologies and platforms. Proficiency in scripting and automation using Bash, Python, Ansible, Terraform, or PowerShell . Advanced knowledge of networking and infrastructure technologies. Experience with monitoring, logging, security, and incident-response tools. Strong understanding of databases such as MySQL, PostgreSQL, MongoDB, and Redis . Strong troubleshooting and problem-solving abilities. Excellent verbal and written communication skills. Ability to work independently and effectively under pressure. Willingness to work US Central Time and participate in rotational on-call support. Company Industry IT - Software Services Department / Functional Area IT Software Keywords L3 Linux System Engineer Get real-time job updates only on our App