Mainframe Modernization - IBM DataPower Engineer

Work Location: London

Work Mode: Hybrid (2-day Onsite in London)

Day Rate: £600-£650 - Inside IR35

Our client, a major UK-focused bank offering retail, commercial, and private banking services are urgently looking for an IBM DataPower Engineer with mainframe Modernization experience.  The successful candidate will be responsible for designing and implementing secure, high-performance integration solutions using IBM DataPower Gateway to expose mainframe services (CICS, IMS, DB2, MQ) as modern APIs (REST/JSON, SOAP). Enable legacy-to-digital transformation by bridging z/OS applications with API platforms and cloud.

Your responsibilities:

• Develop and configure DataPower services (MPGW, XML Firewall, WS-Proxy) for protocol mediation and security.
• Implement OAuth2, JWT, TLS/mTLS, and AAA policies for secure API access.
• Integrate with CICS, IBM MQ, and DB2 for backend connectivity.
• Connect to database like PostgreSQL via REST/HTTP Services Via JDBC through Integration Layer, MQ or Kafka Bridge.
• Perform XSLT/GatewayScript transformations and schema validations.
• Automate deployments via SOMA/REST APIs, CI/CD tools (Jenkins, Ansible).
• Ensure high availability, performance tuning, and compliance (PCI DSS, GDPR).

Essential skills/knowledge/experience:

• Strong experience in IBM DataPower Gateway configuration and troubleshooting.
• Knowledge of Mainframe integration patterns (CTG, IMS Connect, MQ).
• Expertise in API security, XSLT, and GatewayScript.
• Familiarity with API Connect, DevOps automation, and observability tools.

Desirable skills/knowledge/experience:

• Mainframe modernization experience

Forward your CV NOW, for the chance to work for a major UK-focused bank that believe in building and sustaining a culture of equity and belonging where everyone can thrive.