Remote Senior COBOL Developer — z/OS & Data Modernization

Workstate; Colombia; A distancia; COP 120.000.000 - 180.000.000; Jornada completa

Descripción de la vacante

Workstate seeks a Senior COBOL Developer to join our team for an 18-month modernization project. You will convert a legacy RPG II codebase to COBOL on IBM z/OS in preparation for a cloud migration to Google Cloud Platform using Raincode.

This fully remote role is open to candidates in Colombia or Argentina with the right to work. You will collaborate with US-based clients, perform data-focused analysis, and ensure high-quality, maintainable COBOL output throughout the migration.

Formación

• Strong SQL and data skills, especially DB2 for z/OS (embedded SQL, tuning, data modeling).
• JCL, TSO/ISPF and batch processing.
• VSAM, QSAM/sequential files and GDGs.
• Mainframe utilities such as DFSORT/SYNCSORT and IDCAMS.
• CICS.
• Legacy modernization, code conversion or mainframe migration projects.
• Mainframe rehosting or emulation platforms (Raincode, Micro Focus/Rocket Enterprise Server) or GCP.
• Source control and change management tools (Git, Endevor, ChangeMan).
• Data validation, reconciliation and parallel-run testing.
• C1 level (advanced) or higher English, written and verbal.

Responsabilidades

• Convert legacy RPG II programs into well-structured, maintainable COBOL on z/OS.
• Analyze existing program logic, file layouts and data flows to ensure identical behavior.
• 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.
• Take part in unit, regression and parallel testing, including data validation and reconciliation.
• 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 migration teams in an Agile setting.

Conocimientos

SQL

DB2 for z/OS

JCL

TSO/ISPF

Batch processing

VSAM

QSAM/sequential files

GDGs

DFSORT/SYNCSORT

IDCAMS

CICS

Legacy modernization

Raincode

GCP

Git

Endevor

ChangeMan

Data validation

Parallel-run testing

English communication

Herramientas

Raincode

GCP

Endevor

ChangeMan

Git

Descripción del empleo

Workstate seeks a Senior COBOL Developer to join our team for an 18-month modernization project. You will convert a legacy RPG II codebase to COBOL on IBM z/OS in preparation for a cloud migration to Google Cloud Platform using Raincode.

This fully remote role is open to candidates in Colombia or Argentina with the right to work. You will collaborate with US-based clients, perform data-focused analysis, and ensure high-quality, maintainable COBOL output throughout the migration.