Demo

Senior Mainframe Developer

Reqroute, Inc
Mc Lean, VA Contractor
POSTED ON 7/30/2026 CLOSED ON 7/31/2026

What are the responsibilities and job description for the Senior Mainframe Developer position at Reqroute, Inc?

Job Title: Senior Mainframe Developer

Location: McLean, VA (Onsite)


Employment Type: W2 Only


Job Summary

We are seeking an experienced Senior Mainframe Developer with a strong background in Banking and Mainframe Application Development & Support. The ideal candidate will have 8–10 years of experience working on enterprise mainframe applications, providing both development and production support while collaborating with cross-functional teams to resolve complex business and technical issues.

Required Skills & Experience

  • 8–10 years of experience in Mainframe Application Development and Systems Analysis.
  • Strong experience in Mainframe Application Support.
  • Banking domain experience is mandatory.
  • Hands-on experience with:
  • COBOL
  • CICS
  • JCL
  • DB2
  • VSAM
  • Strong knowledge of:
  • Easytrieve
  • CA-7
  • PANVALET
  • XPEDITOR
  • PANAPT
  • FILEAID
  • Experience working with file structures including:
  • VSAM
  • GDG
  • Fixed Block
  • Variable Block
  • Strong knowledge of:
  • TSO
  • ISPF/ISPF-PDF
  • FTP
  • Experience with Job Control Language (JCL) execution and batch processing.
  • Experience developing COBOL-DB2 applications and CICS-based programs.
  • Knowledge of VSAM dataset processing and dataset allocation.
  • Exposure to REXX scripting (preferred).

Key Responsibilities

  • Develop, enhance, and support enterprise Mainframe applications.
  • Provide production support and troubleshoot complex application issues.
  • Analyze business requirements and investigate complex business cases by reviewing application code.
  • Support incident, problem, and job scheduling activities.
  • Collaborate with development and support teams to ensure application stability and performance.
  • Maintain technical documentation and update document repositories.
  • Participate in code reviews, testing, and deployment activities.
  • Communicate effectively with technical and business stakeholders.

Preferred Skills

  • Experience with REXX scripting.
  • Experience in Job Scheduling, Incident Management, and Problem Management processes.
  • Exposure to CICS administration is a plus.
  • Strong analytical and troubleshooting abilities.
  • Excellent verbal and written communication skills.


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$60.00 to $74.00
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