Senior Developer â IBM z/OS Connect
About The Position
ITTConnect is seeking a Senior Mainframe Developer - IBM zOS Connect 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. The role focuses on supporting Gigawatt.ai modernization initiatives by designing and building new z/OS-based services integrated with MACSS (legacy utility management mainframe application). This role focuses on exposing mainframe capabilities as modern APIs and enabling seamless enterprise integration.
Requirements
- Strong hands-on experience with IBM z/OS Connect (EE preferred)
- Solid background in z/OS environment (CICS, IMS, DB2)
- Experience building and consuming REST APIs
- Knowledge of JSON, OpenAPI/Swagger
- Familiarity with mainframe integration patterns
- Strong debugging and performance tuning skills on z/OS
- Experience working in enterprise, high-availability environments
Nice To Haves
- Experience with API management tools (e.g., IBM API Connect)
- Exposure to middleware/integration platforms
- Understanding of security protocols (OAuth, JWT, RACF)
- Prior experience with legacy system modernization initiatives
Responsibilities
- Design, develop, and deploy RESTful APIs using IBM z/OS Connect
- Build and expose mainframe services (CICS, IMS, DB2) to distributed systems
- Integrate z/OS services with MACSS and other enterprise platforms
- Translate business requirements into scalable API-based solutions
- Ensure performance, security, and reliability of z/OS services
- Collaborate with cross-functional teams (middleware, integration, application teams)
- Troubleshoot and resolve issues across z/OS and API layers
- Support modernization initiatives by enabling API-driven mainframe access
Stand Out From the Crowd
Upload your resume and get instant feedback on how well it matches this job.
What This Job Offers
Career Level
Senior
Education Level
No Education Listed
