Senior Middleware Engineer

MQ & WAS Senior Middleware Engineer
6 month contract with likely extension
Inside IR35 via Umbrella
Remote based

Join a major transformation initiative modernising critical infrastructure across a large, well-established technology portfolio. We're looking for an experienced MQ & WAS Senior Middleware Engineer to support a long-term migration programme moving Legacy SLES and Oracle Linux environments onto Red Hat Enterprise Linux (RHEL) on GCVE.

This is a key engineering role within a 60-person delivery portfolio, working across 30+ projects and collaborating closely with architects, platform teams and application support teams.

About the Programme

You'll be joining a strategic programme addressing operational risk by migrating approximately 27% of the organisation's Unix server estate to RHEL. The initiative follows an incremental, agile PI-planning delivery model and runs alongside BAU upgrade workstreams.

You'll play a central role in platform engineering, application deployment, performance tuning and automation to support successful delivery of this multi-year migration.

What You'll Be Doing

• Install & Configure Middleware: IBM WAS (ND/Liberty), IBM HTTP Server, WebSphere Portal, MQ upgrades, and OS migration to RHEL.
• Deploy & Support Applications: Deploy enterprise applications (EAR/WAR), configure JDBC providers and JMS queues.
• Troubleshooting: Provide expert diagnostic support and root-cause analysis across complex distributed environments.
• Performance & Monitoring: Use tools such as AppDynamics, Wily Introscope or Tivoli to monitor JVMs, tune performance, manage capacity and ensure stability.
• Security Management: Implement SSL/TLS, manage certificates, authentication and authorisation (including OAM).
• Automation: Build scripts in Python, Bash, Perl, Jython or Ansible for deployment, configuration and operational automation.
• Collaboration: Work closely with cross-functional teams to ensure seamless migration, share technical guidance and contribute to best-practice engineering.

What You'll Bring

• Strong IBM MQ expertise (Queue Managers, Clustering, Distributed Queuing).
• Deep knowledge of IBM WebSphere Application Server (ND & Liberty), IHS, and plug-in configuration.
• Proficiency with Linux/UNIX platforms (SLES, Oracle Linux, RHEL) and Windows.
• Scripting experience - Bash, Python, Perl, PowerShell, Jython.
• Familiarity with CI/CD tooling (Jenkins, GitLab) and monitoring tools.
• Solid understanding of networking fundamentals - TCP/IP, DNS, Firewalls, load balancing.
• Knowledge of related technologies such as IBM ACE, Kafka or RabbitMQ.
• Experience with DevOps/SRE practices, ITIL processes, and Jira.

If this role is of interest to you, and you have the appropriate skill set and experience, please apply now with an updated CV!

Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.