z/OS Connect API Engineer

Job Description
ITTConnect is seeking a z/OS Connect API Engineer to work on site for a client in the Columbus, OH area. This is a contract position with a client that is a global leader in consulting, digital transformation, technology and engineering services with over 300,000 team members in nearly 50 countries. The end client is in the Utilities sector.

Job location: Columbus, OH (on site work)

The z/OS Connect API Engineer is responsible for modernizing mainframe services through API enablement using IBM z/OS Connect. This role bridges traditional CICS/COBOL systems with modern API and cloud-native architectures while enabling secure, scalable, and reusable integration capabilities.

Key Responsibilities:

• Develop REST APIs using IBM z/OS Connect.
• Expose CICS and DB2 transactions through modern APIcontracts.
• Build and maintain API service definitions, mappings,and YAML configurations.
• Develop OpenAPI specifications aligned with enterprisestandards.
• Configure and support JWT, OAuth2, OIDC, RACF, andcertificate-based authentication.
• Implement CI/CD deployment pipelines using GitHubActions and Gradle.
• Support integration with APIM as the enterprise APIgateway.
• Troubleshoot performance, security, and connectivityissues.
• Develop onboarding templates and reusable APIaccelerators.
• Participate in mainframe modernization initiatives andShadow Service migration efforts.

Requirements

• IBMz/OS Connect
• REST APIs
• OpenAPI
• JSON/XML
• CICS
• COBOL
• DB2
• RACF
• GitHub
• CI/CD

Preferred Skills:

• APIM
• Java
• Spring Boot
• OAuth2/OIDC
• Mainframe modernization programs