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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # z/OS Connect API Engineer - **Company:** Capgemini - **Location:** Chicago, IL, United States - **Salary:** $73,150.0 - $174,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Applications Architecture, Application Performance Management, User Authentication, Build Automation, Customer Information Control System (CICS), Cloud Engineering, COBOL (Programming Language), Continuous Integration, IBM DB2, DevOps, Middleware, Github, Gradle, JSON, Mainframes, OAuth, OpenID, Performance Tuning, IBM Resource Access Control Facility, Release Management, Openid Connect, Swagger, Web Platforms, Web Services, Extensible Markup Language (XML), YAML, Z/OS, Openapi, Enterprise Application Integration, Transaction Processing (Computing), Spring-boot, Git, Deployment Automation, Api Design, Restful APIs, Software Version Control, Api Management, Microservices - **Published:** August 12, 2026 - **Apply:** https://www.capgemini.com/jobs/531393-en_US_SAPBTP/x/ ## About the Role 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., Core Technologies * IBM z/OS Connect Enterprise Edition * REST API Development * OpenAPI / Swagger Specifications * JSON and XML * CICS * COBOL * DB2 * RACF Development & DevOps * GitHub * CI/CD Pipelines * Git-based Version Control * Gradle Build Automation Additional Competencies * API Design and Development Best Practices * Mainframe Integration and Connectivity * Troubleshooting and Performance Tuning * Enterprise Security and Authentication Frameworks Preferred Skills * API Management (APIM) * Java Development * Spring Boot * OAuth 2.0 and OpenID Connect (OIDC) * Enterprise Integration Patterns * Mainframe Modernization Programs * Cloud-native Architecture and Microservices Technical Competencies * Strong understanding of mainframe application architecture and transaction processing. * Experience exposing legacy services as modern REST APIs. * Ability to translate business and technical requirements into scalable API solutions. * Knowledge of enterprise security, authentication, and authorization standards. * Familiarity with API lifecycle management and governance frameworks. * Understanding of DevOps, release management, and automated deployment practices. ## Description 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., 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. * Promote API-first and cloud-integration best practices across development teams., The ideal candidate is a technically strong z/OS Connect API Engineer who can successfully bridge legacy mainframe environments with modern digital platforms. They possess deep expertise in API enablement, enterprise security, and integration technologies, while contributing to broader modernization initiatives that enhance agility, scalability, and business value. ## Related Videos - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [CI/CD with Github Actions](https://www.wearedevelopers.com/videos/856-ci-cd-with-github-actions) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [For the REST of us: API First and Conway’s Law](https://www.wearedevelopers.com/videos/1932-for-the-rest-of-us-api-first-and-conway-s-law) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [10 Highest Paying Programming Languages 2025](https://www.wearedevelopers.com/magazine/150-10-highest-paying-programming-languages-2025) - [Welcome to Switzerland](https://www.wearedevelopers.com/magazine/4-welcome-to-switzerland) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)