Linux Middleware Systems Administrator – Occasional Office Visits

Unison

Linux Middleware Systems Administrator at Unison supporting Linux servers and middleware platforms. Responsible for maintaining system stability and resolving technical issues in a SaaS environment.

Posted 6/10/2026full-time🇺🇸 United StatesMid-LevelSenior💰 $100,000 - $150,000 per yearWebsite

Tech Stack

Tools & technologies

AnsibleApacheAWSAzureDNSFirewallsJavaLinuxMySQLOraclePostgresPythonTCP/IPVMware

About the role

Key responsibilities & impact

Administer, configure, patch, troubleshoot, and maintain Linux servers, primarily Red Hat Enterprise Linux and similar distributions.
Support Linux server builds, system baselines, hardening, vulnerability remediation, documentation, and operational procedures.
Support middleware platforms for application 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, routes, schedules, logs, runtime services, and middleware components.
Troubleshoot issues involving connectivity, credentials, permissions, APIs, databases, Java, memory, certificates, and configuration settings.
Respond to production alerts, outages, Talend failures, Linux issues, middleware incidents, and database connectivity problems.
Support middleware, Talend, and application connectivity to PostgreSQL, Oracle, and MySQL.
Troubleshoot database issues involving JDBC drivers, connection strings, ports, credentials, certificates, firewalls, DNS, and service accounts.
Work with DBA, Hosting, Development, Security, and Support teams to resolve incidents, performance, access, patching, backups, and maintenance.
Participate in on-call and after-hours production support as needed.
Follow change management procedures for changes, patches, deployments, configuration updates, and emergency fixes.

Requirements

What you’ll need

5+ years of Linux systems administration experience in a 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.
Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field preferred.
Equivalent hands-on experience may be considered.
Experience supporting FedRAMP, NIST, federal, or regulated environments preferred.
Experience with Bash, Python, Ansible, PowerShell, or similar scripting tools preferred.
Experience with AWS, Azure, VMware, or hosted infrastructure environments preferred.
Experience with SSL/TLS certificates and secure service communication preferred.
Linux, Red Hat, AWS, Tenable, Security+, or ITIL certifications are a plus.

Benefits

Comp & perks

Equal employment opportunities without regard to race, color, national origin, sex, gender identity, sexual orientation, religion, disability status, age, genetics, veteran status, or any other characteristic protected by federal, state, or local laws.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Linux administrationRed Hat Enterprise Linuxmiddleware supportTalendApache TomcatApache KarafPostgreSQLOracleMySQLscripting (Bash, Python, Ansible, PowerShell)

Soft Skills

troubleshootingdocumentationcommunicationindependent workcross-functional collaboration

Certifications

Linux certificationRed Hat certificationAWS certificationTenable certificationSecurity+ certificationITIL certification