IBM z/OS Integration Engineer - Remote/Sheffield - £500 per day PAYE Umbrella

We are recruiting for a IBM z/OS Integration Engineer on contract to work for a leading Banking group on contract. The role will be based 2 days per week in their Sheffield offices and 3 days remote

As an IBM z/OS Integration Engineer, you will design, configure, and support enterprise integration solutions that connect distributed applications within the core banking services running on IBM z/OS. Using proprietary integration Middleware together with technologies such as IBM MQ, CICS, Db2 and API-enabled services, you will deliver secure, resilient, and high-performing integration solutions that meet both functional and non-functional requirements.

Working as part of a global engineering team, you will help evolve the strategic integration platforms, troubleshoot complex development integration issues, and contribute to the delivery of modern API-based integration across our Mainframe estate.

Required Technical Skills

IBM z/OS & Mainframe

• Strong experience developing or supporting applications on IBM z/OS.
• Good understanding of CICS, Db2 and Cobol.
• Experience analysing application flows and troubleshooting complex technical issues.
• Experience using Endevor, Jira, SNOW, or equivalent source management tools.

Integration Technologies

• Experience with IBM MQ messaging.
• Knowledge of API integration technologies, including z/OS Connect EE or equivalent Mainframe API frameworks.
• Understanding of synchronous and asynchronous integration patterns.
• Experience implementing secure, resilient integrations between distributed and Mainframe applications.
• Understanding of REST APIs and enterprise integration principles.

Development Support

• Experience supporting and resolving integration issues.
• Knowledge of monitoring and diagnostic tooling such as OMEGAMON, Fault Analyzer and dump analysis.
• Understanding of workload scheduling tools such as TWS is also desirable.

Responsibilities

• Design, build and support enterprise integration solutions across IBM z/OS.
• Configure and maintain integration Middleware supporting business-critical services.
• Deliver integrations that satisfy functional, performance, resilience, and security requirements.
• Work with application teams, architects, and infrastructure teams to define integration designs.
• Investigate complex production incidents and identify long-term improvements.
• Produce technical documentation, solution designs, and operational procedures.
• Support continuous improvement of the integration platforms and engineering standards.

What We're Looking For

• Strong analytical and problem-solving skills.
• Excellent written and verbal communication.
• Ability to work independently and collaboratively across global teams.
• Experience working within Agile delivery teams.
• Banking or financial services experience is advantageous.