Job Description

This is a remote position.

We are seeking a highly experienced Assembly Language Developer with deep expertise in IBM z/OS mainframe environments, IRS Core Record Layouts (CRL), and legacy system modernization. The ideal candidate will support the extraction of business rules from legacy code, assist in code conversion to modern platforms, and work with mission-critical IRS systems such as the Individual Master File (IMF) and Business Master File (BMF).

Key Responsibilities:

• Analyze, maintain, and enhance legacy code written in IBM z/OS assembly language.
  
• Extract business rules from existing assembly code and assist in code conversion efforts.
  
• Work with IRS Core Record Layouts (CRL) and QSAM data formats to support data processing and transformation.
  
• Collaborate with cross-functional teams to ensure accurate interpretation and migration of legacy logic.
  
• Utilize CA Endevor Software Change Manager (SCM) for version control, release management, and secure code handling.
  
• Leverage BMC Control-M for job scheduling, workflow automation, and monitoring batch job execution.
  

Required skills/Level of Experience:

• Bachelor’s degree in Computer Science, Information Systems, or a related field.
  
• In-depth knowledge of  IBM z/OS assembly language , including:
  
• Assembly instructions, addressing modes, and data manipulation techniques
  
• Job control processing and JCL
  
• Familiarity with  IBM mainframe architecture , including:
  
• Storage hierarchy (registers, memory, I/O)
  
• System calls (SVCs) and interrupt handling
  
• Experience with  IRS Core Record Layouts (CRL)and  QSAM/VSAM data formats (highly desirable).
  
• Experience with  IRS IMF or BMF systems (highly desirable).
  
• Proficiency with  CA Endevor SCM for secure and controlled software development lifecycle management.
  
• Experience with  BMC Control-M for job automation and workflow orchestration.
  
• Strong understanding of  mainframe development tools , including debuggers, assemblers, linkers, and utilities.
  
• Familiarity with  DB2and other legacy data storage formats.
  
• Understanding of  Java programming , including:
  
• Object-oriented principles, syntax, libraries, and frameworks
  
• Ability to map assembly logic to Java constructs (loops, conditionals, functions, design patterns)
  

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