Middleware Administrator- Irvine, CA

Job Description

Job Title:

Middleware Administrator

Location:

Irvine, CA (Local, 100% Onsite)
Duration: 12‑Month Contract

• Lead Middleware Migration
  
  Activities:
  
  Support the migration of Java‑based enterprise applications from one data center to another, ensuring application servers, configurations, dependencies, and runtime environments are properly transitioned.
• Install and Configure Application Servers:
  Install, configure, administer, and support IBM Web Sphere Application Server and JBoss environments, including application deployments, JVM settings, clusters, nodes, profiles, data sources, security settings, and related middleware components.
• Support Java Application Platforms:
  Work closely with application teams to understand Java application architecture, runtime requirements, dependencies, and integration points to ensure successful migration and post‑migration stability.
• Perform Current‑State Assessment:
  Analyze existing application and middleware architecture, document source environment configurations, and identify requirements for replatforming applications into the target Open Stack‑based environment.
• Migrate Middleware Configurations:
  Translate and migrate configurations from current source environments to target environments, ensuring consistency across application server settings, connection pools, JVM parameters, certificates, security configurations, and environment‑specific variables.
• Tune Performance and Stability:
  Perform application server performance tuning, JVM tuning, monitoring, troubleshooting, and capacity‑related analysis to ensure applications run reliably before, during, and after migration.
• Validate Application Availability:
  Conduct smoke testing, health checks, log reviews, and post‑cutover validation to confirm that applications are up and running successfully in the target environment.
• Coordinate Across Teams:
  Collaborate with multiple application, infrastructure, database, security, network, and project teams to plan migrations, resolve issues, and communicate technical status clearly.
• Support Production Cutovers:
  Provide hands‑on support during production migration windows, including after‑hours and weekend work as required for application cutovers, validation, troubleshooting, and rollback support.
• Troubleshoot Complex Issues:
  Act as an escalation point for middleware‑related incidents, including deployment failures, application startup issues, connectivity problems, JVM errors, performance degradation, and configuration mismatches.

• Professional
  
  Experience:
  
  10+ years of enterprise middleware administration experience supporting large‑scale Java application environments, with strong exposure to data center migration or application replatforming initiatives.
• IBM Web Sphere Expertise:
  Deep hands‑on experience installing, configuring, administering, troubleshooting, and tuning IBM Web Sphere Application Server in enterprise environments.
• JBoss Expertise:
  Strong experience supporting JBoss application server environments, including deployments, configuration management, performance tuning, and troubleshooting.
• Java Application Knowledge:
  Solid understanding of Java application runtime behavior, JVM configuration, application deployments, logs, connection pools, certificates, and integration dependencies.
• Migration
  
  Experience:
  
  Proven experience migrating applications and middleware platforms between data centers, including current‑state discovery, configuration capture, migration planning, cutover execution, and post‑migration validation.
• Architecture Understanding:
  Ability to understand current application architecture and support replatforming efforts into an Open Stack‑based target environment.
• Configuration Management:
  Experience migrating middleware configurations from source environments to target platforms while ensuring application compatibility, security, and operational stability.
• Performance Tuning:
  Strong knowledge of JVM tuning, thread pools, heap sizing, garbage collection, connection pool tuning, application server monitoring, and log‑based troubleshooting.
• Collaboration and Communication:
  Ability to work effectively with…