Linux Middleware Systems Administrator – SaaS Ops

Unison; McLean (VA); Remote; USD 110,000 - 150,000; Full time

Job summary

Unison is seeking a Linux Middleware Systems Administrator to manage Linux servers and middleware platforms in hosted SaaS environments. You will handle administration, patching, monitoring, and production support for Talend components such as TAC, JobServers, Runtime, ESB, Tomcat, and Karaf.

The role emphasizes troubleshooting connectivity, databases (PostgreSQL/Oracle/MySQL), and security hardening. Candidates should have 5+ years in Linux admin roles and be prepared for on-call rotation.

Qualifications

• 5+ years of Linux systems administration experience in production, SaaS, hosting, or enterprise environment.
• Strong hands-on experience with Red Hat Enterprise Linux or similar enterprise Linux platforms.
• Experience supporting middleware, Talend, SOA services, APIs, web services, or application integration platforms.
• Experience with Apache Tomcat, Apache Karaf, Java runtime services, or similar middleware components.
• Experience troubleshooting PostgreSQL, Oracle, and MySQL database connectivity.
• Working knowledge of TCP/IP, DNS, firewalls, ports, load balancers, VPN, and basic network troubleshooting.
• Experience with patching, vulnerability remediation, system hardening, and operational maintenance.
• Ability to use logs and monitoring tools to investigate system, middleware, Talend, and database connectivity issues.
• Strong troubleshooting, documentation, and communication skills.
• Ability to work independently and with cross-functional technical teams.
• Willingness to participate in on-call rotation and production support.
• Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field preferred. Equivalent hands-on experience may be considered.

Responsibilities

• Administer, configure, patch, troubleshoot, and maintain Linux servers, primarily RHEL.
• Support Linux server builds, baselines, hardening, remediation, documentation, and procedures.
• Support middleware platforms for integration, SOA services, APIs, web services, data movement, and batch processing.
• Support Talend components including TAC, JobServers, Runtime, ESB, Tomcat, and Karaf.
• Monitor, troubleshoot, patch, upgrade, deploy, restart, and validate Talend jobs and middleware components.
• Troubleshoot connectivity, credentials, permissions, APIs, databases, Java, memory, certificates, and config issues.
• Respond to production alerts, outages, Talend failures, Linux issues, middleware incidents, and database connectivity problems.
• Work with DBA, Hosting, Development, Security, and Support teams to resolve incidents and maintenance.
• Participate in on-call and after-hours production support as needed.
• Follow change management procedures for changes, patches, deployments, configurations.

Skills

Linux systems administration

Red Hat Enterprise Linux

Troubleshooting

Documentation

Communication skills

On-call rotation

Independent work

Education

Bachelor's degree in IT/CS/Engineering

Tools

Apache Tomcat

Apache Karaf

Java runtime services

PostgreSQL

Oracle

MySQL

TCP/IP

DNS

Firewalls

Job description

Unison is seeking a Linux Middleware Systems Administrator to manage Linux servers and middleware platforms in hosted SaaS environments. You will handle administration, patching, monitoring, and production support for Talend components such as TAC, JobServers, Runtime, ESB, Tomcat, and Karaf.

The role emphasizes troubleshooting connectivity, databases (PostgreSQL/Oracle/MySQL), and security hardening. Candidates should have 5+ years in Linux admin roles and be prepared for on-call rotation.