Z​/OS Mainframe Engineer

Z/OS Mainframe Engineer

Hybrid Working - London - 2 days a week on site.

Financial Services

Lorien's leading banking client is looking for a Z/OS Mainframe Engineer to join the expanding team.

The person will support the test environments to enable delivery of features to mobile/online banking customers. The person will have hands‑on experience with CICS web services, ZOS Connect, DB2, SQL, SOAP, WSDL along with understanding of AWS Services.

This role is based in London.

This role will be Via Umbrella.

Working in a Hybrid Model of 2 days a week on site.

• Provide expert support and timely resolution of environment issues focusing on Mainframe systems and related infrastructure.
• Work on test data support requirement for the teams within Digital Channels.
• Collaborate closely with Data Power and AWS teams to understand integration points and troubleshoot cross-platform dependencies.
• Monitor AWS cloud resources including Cloud Watch for logging and alerting, Dynamo
  
  DB for database management, and AWS Lambda for serverless compute tasks related to project workflows.
• Implement best practices for environment stability, performance tuning, and security compliance.
• Produce detailed technical documentation, status reports, and issue logs for ongoing support and knowledge sharing.
• Communicate effectively with cross‑functional teams including developers, infrastructure engineers, and project managers to ensure timely resolution of issues and alignment on priorities.
• Work on automation using but not limited to Python, Shell Scripting, and Git Lab pipeline.

• Proven experience in Mainframe environments, particularly with CICS web services, ZOS Connect EE, DB2, and batch processing.
• Strong skills in Mainframe transaction management, JCL, and system debugging tools.
• Familiarity with SOAP, WSDL, JSON, and integration patterns such as SOA and RESTful APIs.
• Good working knowledge of AWS services, particularly Cloud Watch, Dynamo
  
  DB, and Lambda, including monitoring, troubleshooting, and optimisation.
• Excellent verbal and written communication skills to effectively articulate technical issues and solutions.
• Ability to work under pressure and manage multiple priorities in a fast‑paced environment.
• Strong problem‑solving skills and a proactive approach to identifying and resolving issues.

• Python knowledge, Experience with Gitlab pipeline, Improvement/Automation with AI