Mainframe Developer
5 days ago
Paris
Role Summary: Contribute to the modernization factory by analyzing, converting, unit testing, and optimizing COBOL/CICS/JCL components for target runtimes (Micro Focus/UniKix) or refactored stacks (e.g., Heirloom to Java). Work under guidance of senior engineers and architects. Required Experience: 3–7 years (incl. 1–2+ years in modernization or strong willingness to cross train) Key Responsibilities: • Conduct code analysis and inventory; identify copybooks, subprograms, datasets, and external interfaces., • Perform code conversion and remediation (e.g., file I/O changes, SQL adaptations, date/encoding fixes)., • Update JCL for target schedulers; script dataset/file movements; parameterize environments., • Implement and run unit tests, create stubs/mocks for MQ/DB interactions, and support regression cycles., • Document mappings (VSAM→RDBMS), error handling, and operational runbooks., • Participate in dress rehearsals, cutover execution checklists, and hypercare defect fixes. Required Technical Skills: • Core Mainframe: COBOL, JCL, CICS basics (transactions, BMS maps), VSAM, DB2 SQL., • Modernization Tooling (experience with any of the below is a strong plus):, • Micro Focus Enterprise Server/Developer (compilation, debugging, region configuration)., • UniKix (CICS emulation concepts) or similar., • Heirloom (COBOL to Java workflow) or exposure to Blu Age/Astadia/Modern Systems processes., • DevOps/Build: Git, CI pipelines, basic scripting (Shell/PowerShell), artifact management., • Data: File format conversions (EBCDIC↔ASCII), VSAM to relational mapping fundamentals. Nice to Have: • Java/.NET basics (post refactor support), REST APIs, message brokers, Control M, cloud fundamentals. Soft Skills: • Detail orientation, willingness to learn, collaboration, ownership of deliverables.
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