Java Application Server Admin

Java Application Server Administrator WebSphere & Tomcat
Experienced Java & Application Server Administrator with strong hands-on expertise in administering IBM WebSphere Application Server WAS and Apache Tomcat environments. The ideal candidate will be responsible for the deployment, configuration, performance tuning, and troubleshooting of Java applications across test and production environments. Familiarity with security standards, middleware troubleshooting
Key Responsibilities:
Install, configure, upgrade, and maintain IBM WebSphere Application Server Base/ND and Apache Tomcat environments.
Java/JEE applications migration to higher version of WebSphere .
Perform troubleshooting and root cause analysis for application server issues (including JVM crashes, thread dumps, memory leaks).
Configure data sources, JMS, SSL certificates, security realms, and clustered environments.
Monitor and optimize server performance heap, garbage collection, connection pools, etc.
Automate administrative tasks using scripting (Shell, Jython, wsadmin).
Ensure high availability and reliability of application server infrastructure.
Apply patches, fix packs, and perform backup and recovery procedures as needed.
Required Skills and Experience:
Strong hands-on experience with IBM WebSphere Application Server 8.5.x / 9.x
Experience administering and tuning Apache Tomcat in production environments.
Solid understanding of JVM internals, memory management, and tuning.
Expertise with Linux environments and command-line tools.
Proficient in application deployment lifecycle, including WAR/EAR packaging and troubleshooting.
Experience with SSL, keystores/trust stores, and security hardening.
Knowledge of load balancing, session replication, and failover strategies.
Scripting skills using Shell, Jython, or Python for automation.
Understanding of log analysis tools, performance profilers, and monitoring (e.g., New Relic