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Sr. Mainframe Developer (CEDF)

Adbakx LLC
Reading, PA Contractor
POSTED ON 8/4/2026 CLOSED ON 8/7/2026

What are the responsibilities and job description for the Sr. Mainframe Developer (CEDF) position at Adbakx LLC?

Position: Sr. Mainframe Developer (CEDF)

Location: Reading, PA Hybrid Work Model

Type of Employment: 12 Months Contract

Role Description:

We are seeking an experienced Mainframe Developer with strong expertise in COBOL-based application development, maintenance, and support. The ideal candidate will possess deep technical knowledge of IBM mainframe technologies and tools, with a proven ability to troubleshoot complex production issues, optimize system performance, and collaborate effectively with cross-functional teams.

Key Responsibilities:

  • Design, develop, enhance, and maintain mainframe applications using COBOL II, JCL, CICS, and related technologies.
  • Develop and support online and batch processing applications in a mainframe environment.
  • Work with VSAM files for data storage, retrieval, and maintenance activities.
  • Create and maintain screen maps using SDF II (COBOL Maps).
  • Perform debugging and issue resolution using CEDF (CICS Debug Utility) and IBM Debugging Utility.
  • Utilize File Manager/FileAid tools for data analysis, testing, and troubleshooting.
  • Analyze application performance and implement system-level tuning and optimization.
  • Support system security, stability, and compliance requirements.
  • Investigate and resolve production incidents and technical issues in a timely manner.
  • Collaborate with business stakeholders, analysts, and development teams to deliver high-quality solutions.
  • Prepare technical documentation and participate in code reviews and knowledge-sharing activities.

Required Skills & Qualifications:

  • Strong proficiency in COBOL II, JCL, CICS, and other mainframe programming technologies.
  • Hands-on experience with VSAM files.
  • Experience using SDF II (COBOL Maps).
  • Experience with CEDF (CICS Debug Utility).
  • Experience with File Manager or FileAid tools.
  • Experience with IBM Debugging Utility.
  • Knowledge of system-level debugging, performance tuning, and system security.
  • Experience with Easytrieve.
  • Strong analytical and problem-solving skills.
  • Ability to troubleshoot and resolve complex technical issues.
  • Excellent verbal and written communication skills.
  • Ability to work effectively in a collaborative team environment.

Preferred Qualifications:

  • Experience supporting large-scale enterprise mainframe applications
  • Familiarity with production support and incident management processes
  • Knowledge of software development lifecycle (SDLC) and best practices

Salary : $60 - $70

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