Senior COBOL Developer – z/OS

• Convert legacy RPG II programs into well-structured, maintainable COBOL on z/OS
• Analyze existing program logic, file layouts and data flows to ensure converted code behaves the same way
• Develop and maintain JCL, batch job streams and related utilities
• Write and tune SQL (DB2 for z/OS) and work with VSAM and sequential datasets
• Participate in unit, regression and parallel testing, including data validation and reconciliation between legacy and converted output
• Prepare code and data for rehosting on GCP with the Raincode compiler and runtime
• Document converted programs, data dependencies and technical decisions
• Work with the client's technical and migration teams in an Agile setting

• 6+ years of professional COBOL development experience on IBM z/OS mainframes
• Strong SQL and data skills, especially DB2 for z/OS (embedded SQL, query tuning, data modeling)
• JCL, TSO/ISPF and batch processing
• VSAM, QSAM/sequential files and GDGs
• Mainframe utilities such as DFSORT/SYNCSORT and IDCAMS
• CICS
• Experience with legacy modernization, code conversion or mainframe migration projects
• Experience with mainframe rehosting or emulation platforms (Raincode, Micro Focus/Rocket Enterprise Server) or GCP
• Experience with source control and change management tools (Git, Endevor, ChangeMan)
• Experience with data validation, reconciliation and parallel-run testing
• B2 level (upper-intermediate) or higher English language competency with ability to communicate effectively in professional settings, both written and verbal
• Experience with RPG II or other IBM midrange languages is a plus but is not required