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Freelance Mainframe Applications Developer Jobs (NOW HIRING)

Mainframe Assembler Developer

Lees Creek, OH · On-site

$44.50 - $57.25/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Assembler Developer

New Vienna, OH · On-site

$44.25 - $56.75/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Assembler Developer

Cuba, OH · On-site

$44 - $56.50/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Assembler Developer

Martinsville, OH · On-site

$44 - $56.50/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Developer

Mclean, VA

$49.50 - $63.75/hr

Position: Mainframe Developer (Banking Domain) Location: McLean, VA (Onsite, 5 days/week) Note ... Key Responsibilities Design, develop, test, and maintain IBM Mainframe applications Analyze ...

Mainframe Assembler Developer

Port William, OH · On-site

$43.50 - $56/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Assembler Developer

Sabina, OH · On-site

$47.25 - $60.75/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Developer

Mclean, VA · On-site

$49.50 - $63.75/hr

Position: Mainframe Developer (Banking Domain) Location: McLean, VA (Onsite, 5 days/week) Note ... Key Responsibilities Design, develop, test, and maintain IBM Mainframe applications Analyze ...

Mainframe Assembler Developer

Bowersville, OH · On-site

$44 - $56.75/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Assembler Developer

Waynesville, OH · On-site

$44 - $56.50/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler ... Develop and support applications in mainframe environments, including z/OS operating systems.

Mainframe Developer

Mclean, VA · On-site

$49.50 - $63.75/hr

Position: Mainframe Developer (Banking Domain) Location: McLean, VA (Onsite, 5 days/week) Note ... Key Responsibilities Design, develop, test, and maintain IBM Mainframe applications Analyze ...

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Freelance Mainframe Applications Developer information

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$10

$48

$66

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

As of Aug 27, 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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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 Applications Developer

Resource Consultings Services Inc

Montgomery, AL • On-site

Full-time

Re-posted 4 days ago


Job description

Role: Mainframe Applications Developer

Location: Montgomery, Alabama

Duration: Full time


Position Description

  • Lead the design, development, testing, and implementation of Mainframe (COBOL, CICS, DB2, JCL) applications.
  • Having experience with TELON (COBOL Code generator) plus point.
  • Experience in developing Mainframe applications using COBOL, CICS, DB2, JCL and TELON.
  • Write Adhoc queries/SPUFI’s using DB2 SQL statements.
  • Maintain the existing applications/interface files and make the changes as per the user needs.
  • Must be able to work in a software development environment following SDLC of waterfall and Agile/scrum methodologies.
  • Meet with users, gather and analyze user needs and software requirements to determine feasibility of design.
  • Conduct unit testing and assist with integration testing.
  • Provides development status updates to the management on a regular basis.
  • Provides guidance on best practices for software development and ensures adherence to organization’s IT policies.
  • Responsible for writing stored procedures, Views, Functions, Triggers, DDL/DML queries.
  • Child Support Application experience is preferred.
  • Attend Production On-call

Must have Skills Required

  • COBOL, CICS, DB2, JCL, TSO
  • Excellent communication skills, both oral and written.
  • Ability to work independently, under pressure and self-motivated

Skills Preferred

  • Experience in working with  Financial Mainframe applications using COBOL, CICS, DB2, JCL,  and TSO
  • Experience using COBOL code generators such as TELON 
  • Child Support Application development and conversion experience is preferred.

Work Experience Required

•             Bachelor’s degree/Master’s degree with a minimum of 7 years’ experience in Mainframe applications

                                                                                                     (Or)

•             High School diploma or GED with a minimum of 10 years of experience in Mainframe applications.

Experience Preferred

  • Minimum of 8 – 10 years of Mainframe experience using COBOL, CICS, DB2, JCL,TSO
  • Experience in designing, developing and supporting complex mainframe applications.