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Freelance Ibm Mainframe Assembler Jobs (NOW HIRING)

Mainframe Assembler

Wilmington, DE · On-site

$45 - $55/hr

Mainframe Assembler Location: Wilmington, Delaware Pay Rate: $45-$55/hr Contract: Long-Term ... The ideal candidate will have strong expertise in IBM Assembler programming, z/OS, and the Software ...

IBM Mainframe Assembler Programmer

Omaha, NE · On-site

$46.75 - $60.25/hr

IBM Mainframe Assembler Programmer (with experience on Assembler, COBOL, JCL, VSAM, DB2, CICS, ENDEVOR, FILEAID, Debugging tools like XPEDITER/INTERTEST) Job Location : Omaha, Nebraska (Omaha is a ...

Mainframe Assembler

Wilmington, DE · On-site

$47.50 - $61/hr

IBM Assembler (HLASM) Programming * IBM z/OS * Mainframe Application Development * SDLC * Debugging & Troubleshooting * Mainframe Performance Tuning * Technical Documentation * Mainframe System ...

Mainframe Assembler Developer

Addison, TX · On-site

$60 - $65/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

We are seeking a highly experienced Mainframe Assembler Developer to support and enhance a mission-critical legacy application written in IBM z/OS assembler language. This role requires a self ...

Mainframe Assembler

Wilmington, DE · On-site

$60 - $65/hr

Mainframe assemblers are responsible for designing, coding, and testing application programs using the IBM Assembler language. They should also be familiar with the entire Software Development Life ...

Posted today

Mainframe Assembler Developer

Wilmington, DE

$47.50 - $61.25/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

Jamestown, OH

$43.75 - $56.25/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

Reesville, OH

$44.50 - $57/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

Lees Creek, OH

$44.50 - $57.25/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

New Vienna, OH

$44.25 - $56.75/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

Midland, OH

$44 - $56.50/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

Sabina, OH

$47.25 - $60.75/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

Mainframe Assembler Developer

Highland, OH

$45.50 - $58.50/hr

We are seeking an experienced Mainframe Assembler Developer with strong expertise in IBM Assembler programming and mainframe environments. The ideal candidate will be responsible for designing ...

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Freelance Ibm Mainframe Assembler information

See salary details

$10

$53

$72

How much do freelance ibm mainframe assembler jobs pay per hour?

As of Aug 14, 2026, the average hourly pay for freelance ibm mainframe assembler in the United States is $53.38, according to ZipRecruiter salary data. Most workers in this role earn between $47.12 and $60.58 per hour, depending on experience, location, and employer.

What is the difference between Freelance Ibm Mainframe Assembler vs Freelance Cobol Developer?

AspectFreelance Ibm Mainframe AssemblerFreelance Cobol Developer
Required CredentialsAssembler certifications, mainframe experienceCobol certifications, mainframe experience
Work EnvironmentMainframe systems, legacy environmentsMainframe systems, legacy environments
Industry UsageFinancial, government, insuranceFinancial, government, insurance
Common Search/ComparisonYesYes

Both roles involve working on mainframe systems in similar industries, requiring specialized skills and certifications. The main difference lies in the programming languages used: Assembler focuses on low-level coding for hardware interaction, while Cobol developers work on business logic and data processing. Freelance Ibm Mainframe Assembler professionals typically handle performance-critical tasks, whereas Cobol developers often maintain and update legacy applications.

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What cities are hiring for Freelance Ibm Mainframe Assembler jobs?

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What are the most commonly searched types of Ibm Mainframe Assembler jobs?

The most popular types of Ibm Mainframe Assembler jobs are:

What states have the most Freelance Ibm Mainframe Assembler jobs?

States with the most job openings for Freelance Ibm Mainframe Assembler jobs include:

What job categories do people searching Freelance Ibm Mainframe Assembler jobs look for?

The top searched job categories for Freelance Ibm Mainframe Assembler jobs are:

Infographic showing various Freelance Ibm Mainframe Assembler job openings in the United States as of August 2026, with employment types broken down into 63% Full Time, 2% Temporary, and 35% Contract. Highlights an 76% In-person, 2% Hybrid, and 22% Remote job distribution, with an average salary of $111,026 per year, or $53.4 per hour.

Mainframe Assembler

Centstone

Wilmington, DE • On-site

$45 - $55/hr

Contractor

Posted 15 days ago


Job description

Mainframe Assembler

Location: Wilmington, Delaware

Pay Rate: $45–$55/hr

Contract: Long-Term Contract

Schedule: Onsite | 5 Days/Week

Work Model: Onsite (5 Days/Week)

Employment Type: Contract
 

Experience: 10+ Years Required

About the Role

We are seeking an experienced Mainframe Assembler Developer for a contract opportunity in Wilmington, Delaware. The ideal candidate will have strong expertise in IBM Assembler programming, z/OS, and the Software Development Life Cycle (SDLC). This role involves developing, maintaining, and optimizing enterprise mainframe applications while ensuring system reliability and performance.

Responsibilities

• Design, develop, test, and maintain applications using IBM Assembler.
• Analyze business and technical requirements to deliver efficient mainframe solutions.
• Perform debugging, troubleshooting, and performance optimization of mainframe applications.
• Create and maintain technical documentation, coding standards, and program specifications.
• Collaborate with architects, analysts, and development teams throughout the SDLC.

Requirements

• 10+ years of Mainframe Assembler development experience required.
• Strong expertise in IBM Assembler programming and z/OS operating systems.
• Experience with application design, coding, testing, debugging, and production support.
• Solid understanding of the Software Development Life Cycle (SDLC).
• Excellent analytical, troubleshooting, communication, and problem-solving skills.

Position Highlights

Role: Mainframe Assembler Developer
Employment Type: Contract
• • Industry: Enterprise Technology
Technologies: IBM Assembler, z/OS, Mainframe, SDLC, Application Support

Join a collaborative technology team where your mainframe expertise will support the development and maintenance of high-performance enterprise systems while contributing to reliable, business-critical applications.


Centstone logo

About Centstone

Sourced by ZipRecruiter

In the dynamic landscape of today’s business environment, flexibility is key. At Centstone, we understand the unique demands of your industry and offer tailored Contract Hiring solutions to empower your organization with the right talent when you need it most.

Industry

Recruiting and staffing services

Company size

51 - 200 Employees

Headquarters location

Hazlet, NJ, US

Year founded

2022

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