Linux Systems Engineer

Role Objective

Linux Systems Engineer &Middlewareis responsible forthe architecture, deployment, and optimization of our open-source stack and enterprise Linux environments. This role ensures that our application-hosting platforms (Kafka, Apache, Nginx) are secure, high-performing, and resilient through advanced automation and proactive systems management.

Technical Core Competencies

1. Linux Operating System Management

• Installation & Config:Expertisein deploying enterprise distributions includingOracle Enterprise Linux (OEL)andRedHat (RHEL).
• System Internals:Proficient in storage partitioning, managing boot processes (GRUB/systemd), and fine-tuning system services.
• User & Security:Managing centralized user/group identities, setting granularPOSIX file permissions, and ownership (Sudoers/Root management).
• Package Management:Lifecycle management of software usingYUM, DNF, or APTto ensure consistent environment versions.

2. Middleware & Messaging Services

• Web Servers:Advanced configuration and hardening ofApache HTTP ServerandNginx.
• Event Streaming:Administration ofApache Kafkaclusters, including managing producers, consumers, and cluster health.
• Web Services:ManagingHTTPS/SSL/TLS certificatesand ensuring secure communication for all web-facing services.

3. Network & Security Operations

• Networking:Configuring IP addressing, SSH protocols, and managing host-based firewalls (iptables/firewalld).
• Vulnerability Management:ProactiveVulnerability Patchingand applying critical security fixes as per compliance requirements.
• NFS & Storage:Managing Network File Systems (NFS) for cross-server file sharing and data persistence.

4. Performance, Monitoring & Automation

• System Health:Real-time monitoring usingtop,htop,iostat, andsartoanalyzeCPU, Memory, and Disk I/O bottlenecks.
• Scripting:UtilizingBash or Pythonto automate repetitive maintenance tasks, parse logs, and manage text-based configurations.
• Capacity Planning:Forecasting resource needs to ensure the environment scales ahead of business demand.

Key Responsibilities

• High Availability & DR:LeadingDR Switchover/Failovertesting and maintenance to ensure zero business interruption.
• Environment Provisioning:Setting up new Dev, UAT, and Production environments from scratch based on best practices.
• Reporting:Providing monthly analytical reports onAvailability, Change Management, Incidents, and Problem Management.
• Housekeeping:Performing routine "hygiene" tasks, including log rotation, disk cleanup, and service audits.

Candidate Requirements

• Experience:5+ years in Linux Administration (RHEL/OEL) and Middleware management.
• Certification:RHCSA/RHCE (RedHat Certified) or Oracle Linux Certified Professional is highly preferred.
• Analytical Skills:Strong ability to perform Root Cause Analysis (RCA) on complex service failures.
• Availability:Participation in an on-call rotation for critical production support.