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Senior Mainframe Developer Jobs in Chicago, IL (NOW HIRING)

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Application Solution Engineer V

Lake Forest, IL · On-site

$113K - $209K/yr

In addition, prior experience modernizing or migrating from Vitech V3locity, Sapiens ID3, and legacy mainframe policy administration systems is desirable. The Senior Engineer role emphasizes ...

IMC

Global Senior IT Auditor

Chicago, IL · On-site

$140K - $190K/yr

... mainframes and midrange operating systems, middleware, networks, software/source code, data ... engineers, traders, and business operations professionals are united by our uniquely collaborative ...

IMC

Global Senior IT Auditor

Chicago, IL · On-site

$140K - $190K/yr

... mainframes and midrange operating systems, middleware, networks, software/source code, data ... engineers, traders, and business operations professionals are united by our uniquely collaborative ...

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How much do senior mainframe developer jobs pay per hour?

As of Aug 10, 2026, the average hourly pay for senior mainframe developer in Chicago, IL is $59.44, according to ZipRecruiter salary data. Most workers in this role earn between $55.77 and $64.95 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a senior mainframe developer, and why are they important?

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What are some common challenges faced by senior mainframe developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

What is a senior mainframe developer?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.
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Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Chicago, IL as of August 2026, with employment types broken down into 81% Full Time, 5% Part Time, and 14% Contract. Highlights an 82% Physical, 6% Hybrid, and 12% Remote job distribution, with an average salary of $123,629 per year, or $59.4 per hour.

Technology Lead | Database Administration | DB2 on Mainframe

Spruce Infotech

Lisle, IL • On-site

Full-time

Posted 9 days ago

Job description

Work Location & Reporting Address Lisle, IL 60532
Vendor Rate XXX/hr.
Contract duration 10
Target Start Date 10 Aug 2026
Must Have Skills
OpenVMS Legacy Platform Ownership
scripting (DCL), and legacy application support
Support systems utilizing RDB (OpenVMS), Oracle SQL, and legacy data integrations.
Detailed Job Description
Job Description Senior Corvision Developer.Location Remote okPosition SummaryThe Senior CorVision Developer will serve as the primary developer for critical legacy platforms built on OpenVMS, CorVision, RDB, and associated operational tools.The position requires deep technical skills in legacy systems, strong operational reliability discipline, and the ability to provide crossfunctional support during the organizations multiyear modernization transition.OpenVMS Legacy Platform OwnershipServe as
Minimum years of experience
8-10 years
Certifications Needed :No
Top 3 responsibilities you would expect the Subcon to shoulder and execute
Leadership
Good Communication
Problem Solving
Interview Process (Is face to face required?) Yes
Project Code: MBFS Support POS COS RMKT ACE CASE360

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