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Mainframes Developer Jobs in Illinois (NOW HIRING)

Mainframe Developer

Peoria, IL · On-site

$48 - $61.75/hr

Mainframe Developer Location: Peoria, IL (Onsite) Contract (W2) We are looking for an experienced Mainframe Developer with strong expertise in COBOL, JCL, DB2, and Mainframe Scheduling. The ideal ...

Mainframe Developer

Chicago, IL · On-site

$50.50 - $65/hr

MAINFRAME DEVELOPER Location: Chicago, IL (Full Onsite, Open to Relocating Candidates) Visa: Any visa except H1B We're looking for a Mainframe Developer to join our team! If you're experienced with ...

Mainframe Developer

Chicago, IL · On-site

$50.50 - $65/hr

Mainframe Developer (12+ YEARS) Location: Chicago, IL * Required Years of Experience: At least 12+ years of relevant experience * 12+ years of experience as a Mainframe Developer Required Skills:

Mainframe Developer

Peoria, IL · On-site

$48 - $61.75/hr

Mainframe Developer Location: Peoria, IL Must Relocate Openings: 2 Required Skills: * COBOL Expert * JCL Expert * DB2 Expert * Mainframe Scheduler Expert * IMS DB Working knowledge strongly preferred

Mainframe Developer

Chicago, IL · On-site

$50.50 - $65/hr

Mainframe Developer Location: Atlanta, GA / Vienna, VA / Chicago, IL - First Preference Position Overview We are seeking an experienced Mainframe Developer with 12-15 years of experience in COBOL ...

Senior Mainframe DevOps Architect

Lisle, IL

$127K - $173K/yr

About the Role We are seeking a Senior Mainframe DevOps Architect to lead solution design and own end-to-end architecture for enterprise customers-translating complex business requirements into ...

IBM Mainframe Developer ( Cobol )

Chicago, IL · On-site

$50.50 - $65/hr

The ideal candidate will have a strong understanding of IBM mainframe, COBOL, JCL, and db2 development and testing. * The developer will bridge the gap between design and implementation; providing ...

IBM Mainframe Developer ( Cobol )

Chicago, IL · On-site

$50.50 - $65/hr

The ideal candidate will have a strong understanding of IBM mainframe, COBOL, JCL, and db2 development and testing. * The developer will bridge the gap between design and implementation; providing ...

Mainframe Developer

Chicago, IL · On-site

$50.50 - $65/hr

This is for local Mainframe developers.. Contract to hire only Must have GC or USC only 8+ years experience in the US prefer in Financials, investment, banking This position will be responsible for ...

Mainframe Developer

Chicago, IL · On-site

$50.50 - $65/hr

This is for local Mainframe developers.. Contract to hire only Must have GC or USC only 8+ years experience in the US prefer in Financials, investment, banking This position will be responsible for ...

Experience with Mainframe technologies including PL/1, IMSDB, DB2, and JCL. * Strong understanding ... We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and ...

Mainframe Developer

Chicago, IL · On-site

$90K - $96K/yr

Experience with Mainframe technologies (Mainly PL/1, IMSDB, DB2, JCL) etc. * Very good ... engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data ...

Mainframe Developer

Chicago, IL · On-site

$90K - $96K/yr

Experience with Mainframe technologies (Mainly PL/1, IMSDB, DB2, JCL) etc. * Very good ... engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data ...

Mainframe/Cobol developer

Bloomington, IL · On-site

$47 - $60.50/hr

Mainframe/Cobol developer * Resource needed with industry knowledge/experience of IBM's Rational Asset Analyzer (RAA) tool. * Preferable, but not mandatory is additional knowledge/experience of ...

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Mainframes Developer information

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

Is a mainframes developer a good career?

A mainframes developer is a specialized IT professional who maintains and develops applications on mainframe systems, which are used by large organizations for critical data processing. The role offers stable employment, competitive salaries, and opportunities to work with legacy systems and mainframe programming languages like COBOL. However, it requires specific skills and certifications, and the field may have limited growth compared to emerging technologies.

Is a mainframes developer still in demand?

Mainframes developers are still in demand in industries such as finance, government, and healthcare that rely on legacy systems. They typically work with COBOL, JCL, and mainframe environments, and demand persists due to the ongoing need to maintain and upgrade existing mainframe applications. However, the number of new positions is limited compared to emerging technologies, and skills in mainframe modernization are increasingly valued.

What does a mainframes developer do?

A mainframes developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They ensure the stability, security, and efficiency of large-scale enterprise systems, frequently working with legacy code and mainframe-specific tools in a structured environment.

What job categories do people searching Mainframes Developer jobs in Illinois look for?

The top searched job categories for Mainframes Developer jobs in Illinois are:

What cities in Illinois are hiring for Mainframes Developer jobs?

Cities in Illinois with the most Mainframes Developer job openings:

Infographic showing various Mainframes Developer job openings in Illinois as of August 2026, with employment types broken down into 85% Full Time, 2% Part Time, and 13% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Mainframe Developer

Hexacorp

Peoria, IL • On-site

$48 - $61.75/hr

Other

Posted 5 days ago


Job description

Title: Mainframe Developer
Location: Peoria, IL (Onsite)
Contract (W2)

 

Job Description

We are looking for an experienced Mainframe Developer with strong expertise in COBOL, JCL, DB2, and Mainframe Scheduling. The ideal candidate should have hands-on experience developing, maintaining, and supporting mainframe applications in an enterprise environment.

 

Required Skills

  • Expert-level experience with COBOL
  • Expert-level experience with JCL
  • Expert-level experience with DB2
  • Expert-level knowledge of Mainframe Schedulers
  • Working knowledge of IMS DB, IMS DC, SAS
  • Strong troubleshooting, debugging, and problem-solving skills
  • Ability to work effectively in a team environment