Middleware & Infrastructure Administrator

Job Description

Key Responsibilities

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Linux & Middleware Administration

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• Administer, maintain, patch, monitor, and troubleshoot Linux environments, preferably Red Hat Enterprise Linux (RHEL).

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• Install, configure, maintain, and troubleshoot Apache HTTP Server, Docker, NGINX, and Red Hat JBoss Enterprise Application Platform (EAP).

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• Support JBoss configurations including JVM settings, application deployments, data sources, certificates, logging, clustering, and environment-specific configuration.

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• Analyze system and application logs to identify performance, configuration, connectivity, and availability issues.

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• Support SSL/TLS certificates, keystores, truststores, and related application connectivity.

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Java Application Support

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• Possess a working knowledge of Java/Jakarta EE applications and be able to review Java code, stack traces, configuration files, and logs to assist with troubleshooting.

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• Work closely with development teams to diagnose application, JVM, middleware, and infrastructure-related problems.

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• Troubleshoot issues involving JVM memory, threads, garbage collection, connection pools, application dependencies, and service integrations.

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Build & Deployment Support

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• Support and troubleshoot application build and deployment processes across development, test, and production environments.

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• Assist in diagnosing failed builds, deployment failures, configuration issues, dependency problems, permissions, and environment differences.

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• Understand modern CI/CD concepts, Git-based source control, build pipelines, and release processes.

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• Partner with Development and DevOps teams to improve deployment reliability and reduce manual intervention.

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Networking & Infrastructure Coordination

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• Possess a solid understanding of networking concepts including TCP/IP, DNS, routing, firewalls, ports, load balancing, SSL/TLS, NAT, and network connectivity.

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• Understand VIPs, load balancers, firewall rules, and site-to-site (S2S) VPNs well enough to identify requirements and submit accurate network requests.

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• Troubleshoot application connectivity using tools such as curl, openssl, nslookup/dig, traceroute, netstat/ss, and related Linux utilities.

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• Partner effectively with Network and Security teams to diagnose connectivity issues and implement infrastructure changes.

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Required Qualifications

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• 5+ years of Linux systems administration or equivalent enterprise infrastructure experience.

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• Strong hands-on experience with Red Hat Enterprise Linux (RHEL) or comparable Linux distributions.

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• Experience administering and troubleshooting Apache HTTP Server.

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• Experience administering and troubleshooting Red Hat JBoss EAP.

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• Working knowledge of Java/Jakarta EE applications, including the ability to interpret application logs, stack traces, JVM errors, and basic Java code.

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• Experience troubleshooting application builds and deployments.

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• Understanding of Git, CI/CD pipelines, and automated build/deployment processes.

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• Strong networking fundamentals and the ability to translate application requirements into well-defined network requests.

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• Experience troubleshooting complex issues that span application, middleware, operating system, database connectivity, and network layers.

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• Strong communication and documentation skills with the ability to collaborate across Development, Infrastructure, Network, Security, and Operations teams.

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