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Mainframe developer

AceStack LLC

Job Description


Role: Mainframe developer
Employment Type: Full-Time
Location: Charlotte, NC /Newark, DE / Plano, TX

Primary Skill: Mainframes, Cobol, JCL, DB2


Secondary: Agile, CICS


Experience: 7 to 10+ years

Roles & Responsibilities

Job Summary We are seeking a Senior Mainframe Developer with deep expertise in IBM mainframe technologies to design, develop, maintain, and modernize mission-critical enterprise applications.


The ideal candidate will play a key role in system stability, performance optimization, and mentoring junior developers while collaborating with cross-functional teams.

Key Responsibilities

  • Design, develop, test, and maintain mainframe applications using COBOL, PLI, and JCL. Analyze business requirements and translate them into technical solutions.
  • Maintain and enhance existing legacy systems to ensure performance, reliability, and scalability.
  • Debug production issues and perform root-cause analysis.
  • Optimize batch and online processing for efficiency and reliability.
  • Work with DB2, IMS, VSAM, and other mainframe data stores.
  • Participate in system upgrades, migrations, and modernization initiatives.
  • Ensure compliance with security, audit, and regulatory standards. Provide technical leadership and mentor junior developers.
  • Collaborate with QA, operations, business analysts, and infrastructure teams.
Required Qualifications
  • 7 years of hands-on mainframe development experience. Strong proficiency in COBOL and JCL.
  • Experience with CICS andor IMS transaction processing.
  • Solid knowledge of DB2 and SQL.
  • Experience working in large-scale batch and online systems.
  • Strong problem-solving and analytical skills.
  • Excellent communication and documentation abilities.
  • Preferred Qualifications Experience with PLI, REXX, or Assembler.
  • Exposure to mainframe modernization or cloud integration projects.
  • Familiarity with DevOps tools (Endevor, Changeman, Git, CICD pipelines).
  • Knowledge of financial, insurance, healthcare, or government systems.
  • Experience working in Agile or SAFe environments.
Technical Skills
  • OS IBM zOS Languages COBOL, JCL, CICS, IMS Data DB2, VSAM Tools Batch scheduling tools (e.g., Control-M, CA-7) O
  • ther Debugging and performance tuning tools Soft Skills Leadership and mentoring.
  • Strong attention to detail.
  • Ability to work independently and in team environments.
  • Proactive mindset toward system improvement
Vacancy posted 14 hours ago
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