Linux Middleware Systems Administrator (Hybrid - Tysons, VA)

Unison Software, Inc.•,

3d•$100,000 - $150,000•Hybrid

About The Position

Unison is seeking a Linux Middleware Systems Administrator to support Linux servers, middleware platforms, Talend services, SOA integrations, and database-connected applications in hosted SaaS environments. This role is responsible for maintaining stable, secure, and available Linux and middleware systems. The position will support administration, patching, monitoring, troubleshooting, production support, deployments, and operational documentation.

Requirements

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.
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.

Nice To Haves

Experience supporting FedRAMP, NIST, federal, or regulated environments.
Experience with Bash, Python, Ansible, PowerShell, or similar scripting tools.
Experience with AWS, Azure, VMware, or hosted infrastructure environments.
Experience with SSL/TLS certificates and secure service communication.
Linux, Red Hat, AWS, Tenable, Security+, or ITIL certifications are a plus.

Responsibilities

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.