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Freelance Mainframe Applications Developer Jobs (NOW HIRING)

Delan Associates Inc.

Mainframe Developer

Mclean, VA · On-site

$49.75 - $63.75/hr

Deland, Gibson Insurance Associates is seeking an experienced Mainframe Developer with strong ... Responsibilities : • Design, develop, test, and maintain IBM Mainframe applications • Analyze ...

NAVA Software Solutions

Mainframe Developer

Morristown, NJ · On-site

$50.50 - $64.75/hr

NAVA Software solutions is looking for a Sr. Mainframe Engineer Details: Role: Sr. Mainframe ... Be responsible for building Mainframe applications Qualifications: * 5 - 8 years of relevant ...

Digipulse Technologies, Inc

Mainframe Developer

Westlake, TX · On-site

$47 - $60.50/hr

Develop and support applications using COBOL, JCL, CICS, DB2, VSAM, and Syncsort. * Analyze and ... mainframe applications with distributed systems. * Familiarity with CI/CD and DevOps practices.

Judge Group, Inc.

Mainframe Developer

Malvern, PA · On-site

$48 - $61.75/hr

Our client is currently seeking a Mainframe Developer 1+ Year Contract Opportunity Malvern, PA ... Experience with debugging across front end applications thru to backend processes and data ...

Centstone

Mainframe Assembler

Wilmington, DE · On-site

$45 - $55/hr

... Assembler programming, z/OS, and the Software Development Life Cycle (SDLC). This role involves developing, maintaining, and optimizing enterprise mainframe applications while ensuring system ...

Centstone

Mainframe IMS & CICS Developer

Wilmington, DE · On-site

$45 - $55/hr

Mainframe IMS & CICS Developer Location: Wilmington, DE (100% Onsite - 5 Days/Week) Pay Rate: $45 ... Design, develop, maintain, and support enterprise mainframe applications using COBOL, IMS/DB, and ...

Percient Inc.

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61/hr

Mainframe Developer Location: Wilmington, DE * Design, coding, and testing: Mainframe assemblers ... They perform debugging and troubleshooting of mainframe applications to ensure they function ...

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How much do freelance mainframe applications developer jobs pay per hour?

As of Aug 6, 2026, the average hourly pay for freelance mainframe applications developer in the United States is $48.94, according to ZipRecruiter salary data. Most workers in this role earn between $43.51 and $56.97 per hour, depending on experience, location, and employer.
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Freelance Mainframe Applications Developer jobs near you
Infographic showing various Freelance Mainframe Applications Developer job openings in the United States as of August 2026, with employment types broken down into 44% Full Time, 4% Part Time, 4% Temporary, and 48% Contract. Highlights an 80% In-person, and 20% Remote job distribution, with an average salary of $101,800 per year, or $48.9 per hour.

Mainframe Application Engineer, Senior

Imagine One Technology & Management Ltd

Charleston, SC • On-site

Other

Medical, Dental, Vision, Retirement

Re-posted 12 days ago

Job description

Imagine One Technology & Management, Ltd. is seeking a Senior Mainframe Application Engineer, contingent upon award of the associated work. This position will be based in Charleston, SC.

The Senior Mainframe Application Engineer is responsible for analyzing, planning, designing, and documenting changes to mainframe software applications written in COBOL that execute in batch or online CICS environments within a z/OS-based environment. The engineer formulates or updates Business Information System (BIS) architectures and assists mainframe software sustainers with implementation and testing activities supporting Marine Corps enterprise manpower systems.

Key Responsibilities:

  • Analyze, design, and document updates to COBOL-based mainframe applications.
  • Implement changes to batch and CICS applications within z/OS environments.
  • Architect solutions based on government-provided design requirements.
  • Perform unit testing and support peer reviews.
  • Support Production Trouble Reports (PTRs), SCRs, and FCRs.
  • Provide hour estimates for Software Releases and Standalone SCRs.
  • Analyze and translate DoD pay and personnel business rule logic into secure code.
  • Develop operational and system-level architecture views.
  • Support engineering efforts aligned with MCAAP or other RMF implementations.

Desired Experience:

  • 6+ years engineering enterprise-scale mainframe software applications.
  • 6+ years implementing and updating DoD pay and personnel business rule logic.
  • 4+ years engineering systems within MCAAP or other Risk Management Framework implementations.
  • Experience developing operational and system-level architecture views.

Security Requirements:

  • U.S. Citizen.
  • Active Secret clearance required.

Imagine One offers a full package of benefits and competitive salary, excellent group medical, vision, and dental programs. 401K savings plan; $4K annual tuition reimbursement ($5K if pursuing master’s degree); employee training, development, and education programs; profit sharing; advancement opportunities; and much more!

ISO 9001:2015, ISO 20000-1:2018, ISO 27001:2022
CMMI Development and Services - Maturity Level 3
CMMC Level 2 (C3PAO)
An Employee-Owned Business

EEO/Vets/Disabled