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z/OS Connect API Engineer

ITTConnect
Columbus, OH Full Time
POSTED ON 8/14/2026
AVAILABLE BEFORE 9/13/2026
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

Salary.com Estimation for z/OS Connect API Engineer in Columbus, OH
$81,132 to $103,611
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