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Mainframe Assembler Developer

RIT Solutions

Mainframe Assembler Developer

Location: Hybrid in Addison, TX or Charlotte, NC (3 days in office 2 days remote) Relo candidates are fine

We just got a new request with Client for a Mainframe Assembler Developer. Full details are below. We have a call with the manager later this afternoon to setup interviews so let's try to get some candidates over by then.

We are seeking a highly experienced Mainframe Assembler Developer to support and enhance a mission-critical legacy application written in IBM z/OS assembler language. This role requires a self-sufficient engineer capable of independently analyzing, maintaining, and improving high-volume, high-availability batch processing systems in a regulated financial services environment. The ideal candidate brings deep expertise across core mainframe technologies and strong familiarity with parallel sysplex environments.

Key Responsibilities
  • Analyze, maintain, and improve high-volume, high-availability batch processing systems.
  • Provide production support for IBM Mainframe applications.
  • Develop and troubleshoot JCL.
  • Manage GDGs and batch processing to meet strict SLAs.
  • Work independently within loosely documented legacy environments.
  • Analyze complex assembler codebases to diagnose and resolve critical production issues.
  • Handle incident management using tools like ServiceNow or Remedy.
Experience:

5+ years of experience in IBM Mainframe application development and production support.

Technical Skills:
  • Assembler (HLASM) programming
  • JCL/ECL development and troubleshooting
  • TSO / ISPF environment
  • Connect:Direct (NDM)
  • ISPW (or equivalent change management tools)
  • CA7 scheduling
  • GitHub CoPilot
  • Mainframe datasets, VSAM, and utilities
Vacancy posted 4 days ago
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