Senior Linux (UNIX) Application Support Engineer (10 15+ Years Experience)

W2/IC Only

Role Summary

We are seeking a highly experienced Senior Linux/UNIX Application Support Engineer with deep expertise in supporting enterprise-grade applications running on Linux environments. The ideal candidate has 10 15+ years of hands-on experience managing installation, configuration, upgrades, patching, troubleshooting, and operational stability of mission-critical middleware, databases, and infrastructure services.

This role is focused on production stability, lifecycle management, automation of maintenance activities, and cross-platform application support in large-scale enterprise environments.

Key Responsibilities

Application Installation & Lifecycle Management

• Install, configure, and maintain enterprise applications on Linux/UNIX systems
• Perform version upgrades, migrations, and patch management across production and non-production environments
• Validate compatibility between application layers, OS versions, and dependent libraries
• Maintain installation standards, runbooks, and deployment documentation

Patching & Upgrades

• Plan and execute regular patch cycles for applications and middleware
• Coordinate OS-level dependencies with Linux system administrators
• Perform rollback planning and disaster recovery validation for upgrades
• Ensure compliance with security and vendor patch requirements

Production Support & Incident Management

• Provide Level 2/Level 3 production support for Linux-hosted applications
• Troubleshoot performance issues, crashes, memory leaks, and connectivity problems
• Conduct root cause analysis (RCA) for major incidents
• Work with engineering, database, and infrastructure teams to resolve critical outages

Automation & Tooling

• Automate installation, patching, and health checks using scripting (Bash, Python, Ansible, etc.)
• Improve deployment pipelines and reduce manual intervention
• Integrate monitoring and alerting systems for proactive issue detection

Performance & Capacity Management

• Analyze application performance and system resource utilization
• Tune JVM-based and database-driven applications
• Assist in capacity planning and scalability assessments

Collaboration & Documentation

• Work closely with developers, DBAs, network engineers, and security teams
• Maintain operational documentation, SOPs, and runbooks
• Participate in on-call rotations for critical systems

Required Experience & Skills

• 10 15+ years of experience in Linux/UNIX system or application support
• Strong expertise in enterprise application installation, patching, and upgrades
• Deep understanding of middleware, databases, and distributed systems
• Strong troubleshooting skills across OS, application, and network layers
• Experience with automation tools and scripting (Bash, Python, Ansible)
• Familiarity with monitoring/logging tools (e.g., Splunk, Prometheus, ELK stack)
• Experience working in large enterprise or financial services environments preferred

Common Linux/UNIX Enterprise Application Stack (Top 20)

Below is a representative list of widely used enterprise applications and infrastructure products supported in Linux environments:

Databases

1. IBM Db2
2. PostgreSQL
3. MySQL
4. Oracle Database

Messaging & Integration

5. IBM MQ
6. RabbitMQ
7. Apache Kafka

Web & Application Servers

8. Apache HTTP Server
9. NGINX
10. Apache Tomcat
11. Red Hat JBoss
12. Oracle WebLogic Server
13. IBM WebSphere

Caching & In-Memory Systems

14. Redis

Search & Observability

15. Elasticsearch
16. Logstash
17. Kibana

Infrastructure & DevOps

18. Kubernetes
19. Docker
20. Ansible