z/OS Connect API Engineer - Capgemini

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world.

Location

Atlanta, Chicago, Dallas, NJ, Nashville

Your role

The z/OS Connect API Engineer is responsible for modernizing enterprise mainframe services by enabling secure, scalable, and reusable APIs using IBM z/OS Connect. This role serves as a critical bridge between traditional CICS/COBOL-based systems and modern API-driven, cloud-native architectures, helping organizations accelerate digital transformation while maximizing the value of existing mainframe investments.

The ideal candidate will have strong expertise in IBM z/OS Connect, API development, mainframe integration technologies, and enterprise security frameworks, along with experience in automation and CI/CD practices.

Key Responsibilities

API Development & Integration

• Design, develop, and deploy RESTful APIs using IBM z/OS Connect Enterprise Edition.
• Expose existing CICS, COBOL, and DB2 transactions as modern API services.
• Create and maintain API service definitions, request/response mappings, and YAML-based configurations.
• Develop and manage OpenAPI specifications in alignment with enterprise API standards and governance frameworks.
• Build reusable integration patterns and API accelerators to support rapid service onboarding.

Security & Authentication

• Configure and support enterprise authentication and authorization mechanisms, including:
• JWT (JSON Web Tokens)
• OAuth 2.0
• OpenID Connect (OIDC)
• RACF
• Certificate-based authentication
• Ensure APIs comply with organizational security, compliance, and governance requirements.

DevOps & Deployment

• Design and maintain CI/CD pipelines using GitHub Actions, Gradle, and related DevOps tools.
• Automate API deployment, testing, and release management processes.
• Support integration with enterprise API management platforms and gateways.

Platform Support & Optimization

• Troubleshoot and resolve API performance, security, configuration, and connectivity issues.
• Monitor API health, reliability, and service availability.
• Collaborate with infrastructure, middleware, and application teams to optimize service performance.

Modernization & Transformation

• Support enterprise mainframe modernization initiatives.
• Contribute to Shadow Service Migration and API enablement programs.