Linux Systems Engineer

Role Objective
Linux Systems Engineer & Middleware is responsible for the 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:  Expertise in deploying enterprise distributions including  Oracle Enterprise Linux (OEL)  and  Red Hat (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 granular  POSIX file permissions , and ownership (Sudoers/Root management).
Package Management:  Lifecycle management of software using  YUM, DNF, or APT  to ensure consistent environment versions.
2. Middleware & Messaging Services
Web Servers:  Advanced configuration and hardening of  Apache HTTP Server  and  Nginx .
Event Streaming:  Administration of  Apache Kafka  clusters, including managing producers, consumers, and cluster health.
Web Services:  Managing  HTTPS/SSL/TLS certificates  and 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:  Proactive  Vulnerability Patching  and 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 using  top, htop, iostat, and sar  to analyze CPU, Memory, and Disk I/O bottlenecks.
Scripting:  Utilizing  Bash or Python  to 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:  Leading  DR Switchover/Failover  testing 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 on  Availability, 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 (Red Hat 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.