Sr. Software/Platform Engineer - Mainframe

Job Summary MetLife is seeking a Senior Software Development Engineer to lead technical design and delivery for mission-critical mainframe applications supporting high-volume financial and payment systems. The role will focus on modernizing COBOL programs, optimizing z/OS performance, and enabling API integration through IBM z/OS Connect Enterprise Edition (EE), while ensuring reliability, security, and compliance across the PCTS, GPAY, and FMS platforms. Key Responsibilities u00b7 Design, develop, and optimize COBOL applications on z/OS, leveraging Enterprise COBOL 6.x features for performance and maintainability. u00b7 Build and deploy RESTful APIs using IBM z/OS Connect EE: map copybooks/DFHCOMMAREA or CICS channels/containers to JSON; configure CICS IPIC connections; integrate with APIC/MQ. u00b7 Author and maintain JCL, batch utilities (IDCAMS/DFSORT), and CICS transactions; ensure robust restart/recovery strategies and data integrity across DB2/VSAM. u00b7 Implement and enforce RACF security for datasets, transactions, and API endpoints, partnering with platform/security teams on certificates and OAuth flows. u00b7 Collaborate on workload scheduling (OPC/IBM Z Workload Scheduler) and release/change management, including lower-to-prod promotion and cutover/backout planning. u00b7 Drive engineering best practices: code reviews, automated testing, documentation, runbooks, and operational readiness (monitoring/alerting, incident response). u00b7 Mentor and upskill engineers; lead KT sessions and foster consistent Agile/SDLC practices across onshore/offshore teams. Core Requirement - IBM z/OS Connect EE u00b7 Demonstrated hands-on expertise building and operating IBM z/OS Connect EE services and APIs using IDz/z/OS Connect projects. u00b7 Proficiency mapping mainframe data structures (copybooks/DFHCOMMAREA or CICS channels/containers) to JSON schemas and validating request/response payloads. u00b7 Configuration experience for CICS IPIC connections, environment-specific endpoints/ports, APIC backend routing, OAuth/JWT, and certificate/keyring management. u00b7 Troubleshooting experience across lower and production environments (e.g., BAQR errors, authorization/JSON format issues) using logs/traces and collaboration with platform teams. Required Qualifications 7+ years of mainframe development on z/OS with deep experience in COBOL, JCL, DB2, CICS, VSAM, and common utilities (IDCAMS/DFSORT). Strong command of TSO/ISPF, SDSF, dataset management, SMF awareness, and production debugging/troubleshooting. Experience with workload scheduling (OPC/TWS), recovery design, and change/release procedures. Practical Agile/Scrum experience and SDLC compliance in regulated environments; strong written communication and documentation skills. Preferred Qualifications Exposure to IBM MQ, API/messaging integration, or Red Hat/IBM CP4I (WMB/IIB modernization). Production experience designing, deploying, and operating IBM z/OS Connect EE APIs/services integrated with CICS, APIC/MQ, and enterprise security (OAuth/RACF/certificates). Proven success migrating/recompiling programs to Enterprise COBOL 6.x and applying tuning/optimization techniques. Familiarity with AI tools (examples include GitHub and Co-pilot). Experience with compiler optimization reports, RMF/SMF traces, JES/SDSF job stats, and LE runtime tuning. Test automation experience for mainframe components and API contracts; CI/CD practices adapted for z/OS.Equal Employment Opportunity/Disability/Veterans If you need an accommodation due to a disability, please email us at . This information will be held in confidence and used only to determine an appropriate accommodation for the application process. MetLife maintains a drug-free workplace.

Created: 2026-01-29