Linux & Infrastructure Administrator

Brickstech · India

Job Description

Job Purpose

The Senior Linux & Infrastructure Administrator will be responsible for the administration, monitoring, troubleshooting, and operational support of Tasdeeq's enterprise server and infrastructure environment, with a primary focus on RHEL Linux, Nginx Load Balancers, VMware virtualization, enterprise storage, backup, and DR.

Core Environment

• RHEL Linux production servers
• Nginx Load Balancers running on RHEL VMs
• VMware ESXi / vSphere
• Dell enterprise SAN/storage
• Windows & Linux server infrastructure
• Network and security infrastructure
• Production and DR environments

Key Responsibilities

RHEL / Linux Administration

• Administer and troubleshoot production RHEL Linux servers
• Perform OS installation, configuration, patching, and upgrades
• Manage users, groups, permissions, sudo, and SSH/SFTP
• Troubleshoot CPU, memory, disk, filesystem, boot, and application issues
• Manage packages using RPM/YUM/DNF
• Analyze system logs using journalctl and /var/log
• Manage LVM, partitions, filesystems, and mount points
• Perform filesystem expansion and storage troubleshooting
• Configure and troubleshoot SELinux and firewalld
• Perform Linux security hardening and vulnerability remediation

Nginx Load Balancer - Mandatory

• Administer Nginx Load Balancers running on RHEL VMs
• Configure upstream servers, backend pools, and virtual hosts
• Configure load balancing
• Manage SSL/TLS certificates
• Generate CSRs and install/renew certificates
• Troubleshoot certificate-chain and TLS handshake issues
• Configure health checks and backend failover
• Troubleshoot 502, 503, 504, and other Nginx errors
• Analyze Nginx access and error logs
• Perform configuration changes and controlled reloads
• Troubleshoot connectivity between Nginx, backend servers, network, and firewall

VMware ESXi / vSphere

• Administer and troubleshoot Linux VMs running on VMware ESXi/vSphere
• Create and configure virtual machines
• Manage VM CPU, memory, disk, and network resources
• Troubleshoot VM performance and connectivity issues
• Understand VMware datastores and virtual disk provisioning
• Coordinate with the virtualization team for ESXi-related issues

Dell SAN / Enterprise Storage

• Support Dell enterprise SAN/storage infrastructure
• Understand LUNs, datastores, RAID, multipathing, and storage provisioning
• Troubleshoot Linux/VMware storage connectivity
• Coordinate storage allocation and expansion
• Monitor storage capacity and identify performance issues

Backup & Disaster Recovery

• Support Linux server backup and restoration
• Troubleshoot backup failures
• Participate in DR planning, testing, and recovery activities
• Maintain server and service recovery documentation

Automation & Monitoring

• Strong Bash/Shell scripting skills
• Automate routine Linux administration and monitoring activities
• Basic Ansible knowledge is preferred
• Monitor server, service, and infrastructure health
• Participate in incident response and root-cause analysis

Mandatory Technical Skills

RHEL | Linux Administration | Nginx | SSL/TLS | LVM | Bash/Shell | SSH/SFTP | SELinux | Firewalld | VMware ESXi/vSphere | SAN/Storage | Troubleshooting

Preferred Certifications

• RHCSA — Preferred
• RHCE — Highly Preferred
• VMware certification — Advantage
• Relevant Linux/Cloud certifications — Advantage

Education & Experience

• Bachelor's degree in Computer Science, IT, or a related field
• 3-5 years of hands-on Linux System Administration experience
• Strong practical experience with RHEL production environments
• Demonstrable experience with Nginx and enterprise infrastructure
• Experience with VMware and enterprise storage highly preferred