Mainframe Developer

Experience level (Years) 9+

Must have skills PL1 / Cobol or Easytrieve

Preferred skills Python

Detailed Job Description

Seeking an experienced Mainframe Developer to analyze, convert, and modernize legacy Easytrieve applications into PL/I and/or Python solutions. The ideal candidate will possess strong IBM z/OS mainframe expertise, including Easytrieve, JCL, COBOL/PL/I, DB2, VSAM, and batch processing. Responsibilities include code analysis, redesign, conversion, testing, performance tuning, and production implementation while ensuring functional equivalence and maintaining business logic integrity.

Key Responsibilities

• Analyze existing Easytrieve programs and supporting batch workflows.

• Convert Easytrieve reporting and data-processing logic to PL/I or Python.

• Interpret and document legacy business rules and technical specifications.

• Work with JCL, DB2, VSAM, Sequential Files, and batch scheduling environments.

• Perform code remediation, debugging, unit testing, and system testing.

• Validate converted applications against existing production outputs.

• Optimize performance and maintainability of modernized solutions.

• Collaborate with business analysts, architects, and QA teams.

• Support deployment and post-production stabilization activities.

Required Skills

• 8+ years of IBM z/OS mainframe development experience.

• Strong experience with Easytrieve analysis and maintenance.

• Expertise in PL/I, COBOL, or similar mainframe languages.

• Experience with Python development for modernization initiatives.

• Strong knowledge of JCL, DB2, VSAM, TSO/ISPF, and batch processing.

• Experience with data mapping, file layouts, and report generation.

• Ability to reverse engineer undocumented legacy applications.

• Strong debugging, testing, and problem-solving skills.

Preferred Skills

• Mainframe modernization or migration project experience.

• Experience with automated code conversion tools.

• Knowledge of CICS and IBM utilities.

• Experience with Agile development methodologies.

• Familiarity with cloud-based modernization strategies.