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Workstate

COBOL Developer – z/OS

Workstate

. Convert legacy RPG II programs into well-structured, maintainable COBOL on z/OS .

Posted 10/7/2026contractRemote • Colombia, ArgentinaMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive COBOL development experience on IBM z/OS mainframes, with strong SQL skills for DB2, and proficiency in JCL and batch processing. Capable of collaborating in Agile environments and executing legacy modernization and mainframe migration projects.

Highest-signal resume keywords
COBOL Development on IBM z/OSSQL for DB2JCL and Batch ProcessingMainframe Migration ExperienceAgile Collaboration

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
COBOLSQLJCLDB2VSAMCICSDFSORTSYNCSORTGitChange Management
Soft Skills
CollaborationDocumentationData Validation
Tools & Technologies
GCPRaincodeMicro FocusRocket Enterprise ServerTSO/ISPF
Industry Keywords
Legacy ModernizationCode ConversionMainframe MigrationData ModelingParallel Testing

Tech Stack

Tools & technologies
Google Cloud PlatformSQL

About the role

Key responsibilities & impact
  • 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 consistently
  • Develop and maintain JCL, batch job streams and related utilities
  • Write and tune SQL for 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
  • Collaborate with the client's technical and migration teams in an Agile setting

Requirements

What you’ll need
  • 4+ 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
  • B1 level (intermediate) or higher English, able to read and write technical documentation and participate in team discussions in English
  • Right to work in Colombia or Argentina
  • RPG II experience is not required; training is provided