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

As an experienced Mainframe Developer , you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. The Project Delivery Talent ...

As an experienced Mainframe Developer , you will have the ability to share new ideas and ... Professional development From entry-level employees to senior leaders, we believe there's always ...

... engineering impact analysis for modernization initiatives Work with business stakeholders to ... to mainframe modernization re platform re engineering programs Ability to perform impact analysis ...

... engineering impact analysis for modernization initiatives Work with business stakeholders to ... to mainframe modernization re platform re engineering programs Ability to perform impact analysis ...

Mainframe Specialist

Chicago, IL · On-site

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Senior Developer

Naperville, IL · On-site

$54.50 - $72/hr

Technical Skills (APPS)-Mainframe-Language-Mainframe - COBOL Job : Technical Lead Other Requirement ... Senior Developer Mandatory Skills Mainframe Cobol (Primary) JCL CICS VSAM Unix Shell scripting is ...

Employee Ensono is a leading, large-scale provider of mainframe and infrastructure services serving ... Work closely with Sales Engineering and the customer on solution, value, and pricing scenarios

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Senior Mainframe Developer information

See Elgin, IL salary details

$38

$56

$65

How much do senior mainframe developer jobs pay per hour?

As of Jul 26, 2026, the average hourly pay for senior mainframe developer in Elgin, IL is $56.99, according to ZipRecruiter salary data. Most workers in this role earn between $53.46 and $62.26 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 are Senior Mainframe Developers?

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.
What are popular job titles related to Senior Mainframe Developer jobs in Elgin, IL? For Senior Mainframe Developer jobs in Elgin, IL, the most frequently searched job titles are:
What job categories do people searching Senior Mainframe Developer jobs in Elgin, IL look for? The top searched job categories for Senior Mainframe Developer jobs in Elgin, IL are:
What cities near Elgin, IL are hiring for Senior Mainframe Developer jobs? Cities near Elgin, IL with the most Senior Mainframe Developer job openings:
Infographic showing various Senior Mainframe Developer job openings in Elgin, IL as of July 2026, with employment types broken down into 85% Full Time, 4% Part Time, 1% Temporary, and 10% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $118,538 per year, or $57 per hour.
Senior Mainframe Developer

Senior Mainframe Developer

Deloitte

Chicago, IL • Hybrid

Other

Posted 4 days ago


Deloitte rating

8.1

Company rating: 8.1 out of 10

Based on 91 frontline employees who took The Breakroom Quiz

58th of 150 rated financial services


Job description

Are you an experienced, passionate pioneer in technology who wants to work in a collaborative environment? As an experienced Mainframe Developer, you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. The Project Delivery Talent Model is designed for professionals with specialized skills that align to a current client need. Team members focus on delivering services to clients, without additional expectations related to business development or promotion. Their employment is tied to their role on a project, and they are eligible for a benefits package that is competitive for project delivery-focused professionals.

Work you'll do/Responsibilities  

  • Responsible for the daily development, maintenance, and support of the mainframe health claims applications.
  • Develop, test, and deploy code changes for claims processing systems based on technical specifications.
  • Monitor daily batch jobs and resolve ABENDs within defined SLA timelines.
  • Assist in unit and integration testing of new healthcare compliance updates.
  • Maintain accurate technical documentation and runbooks for the Operate team.

The Team 

Our AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector solutions in software, data, AI, network, and hybrid cloud infrastructure. These solutions are powered by engineering for business advantage, transforming mission-critical operations. We enable clients to stay ahead with the latest advancements by transforming engineering teams and modernizing technology & data platforms. Our delivery models are tailored to meet each client's unique requirements.

Engineering as a Service provides complete design, implementation, and technology operations, leveraging our core engineering expertise. We transform engineering teams, modernize technology, and deliver complex programs with a product engineering approach. Our flexible delivery models-traditional teams, pools, or pods-are tailored to each client's needs, offering engineering-led advisory, implementation, and operational capabilities to accelerate innovation.

Qualifications 

 Required 

  • 7+ years of experience in software, systems, or embedded engineering
  • 7+ years of experience in Mainframe application development (COBOL, JCL, DB2).
  • Experience with incident and change management processes (e.g., ServiceNow).
  • Bachelor's degree, preferably in Computer Science, Information Technology, Computer Engineering, or related IT discipline; or equivalent experience
  • Limited immigration sponsorship may be available
  • Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve. This may include overnight travel.

Qualifications 

 Preferred  

  • Experience in the healthcare/insurance domain

The wage range for this role takes into account the wide range of factors that are considered in making compensation decisions including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs. The disclosed range estimate has not been adjusted for the applicable geographic differential associated with the location at which the position may be filled. At Deloitte, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $107,900.00-$179,900.00.

Qualifications:

Are you an experienced, passionate pioneer in technology who wants to work in a collaborative environment? As an experienced Mainframe Developer, you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. The Project Delivery Talent Model is designed for professionals with specialized skills that align to a current client need. Team members focus on delivering services to clients, without additional expectations related to business development or promotion. Their employment is tied to their role on a project, and they are eligible for a benefits package that is competitive for project delivery-focused professionals.

Work you'll do/Responsibilities  

  • Responsible for the daily development, maintenance, and support of the mainframe health claims applications.
  • Develop, test, and deploy code changes for claims processing systems based on technical specifications.
  • Monitor daily batch jobs and resolve ABENDs within defined SLA timelines.
  • Assist in unit and integration testing of new healthcare compliance updates.
  • Maintain accurate technical documentation and runbooks for the Operate team.

The Team 

Our AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector solutions in software, data, AI, network, and hybrid cloud infrastructure. These solutions are powered by engineering for business advantage, transforming mission-critical operations. We enable clients to stay ahead with the latest advancements by transforming engineering teams and modernizing technology & data platforms. Our delivery models are tailored to meet each client's unique requirements.

Engineering as a Service provides complete design, implementation, and technology operations, leveraging our core engineering expertise. We transform engineering teams, modernize technology, and deliver complex programs with a product engineering approach. Our flexible delivery models-traditional teams, pools, or pods-are tailored to each client's needs, offering engineering-led advisory, implementation, and operational capabilities to accelerate innovation.

Qualifications 

 Required 

  • 7+ years of experience in software, systems, or embedded engineering
  • 7+ years of experience in Mainframe application development (COBOL, JCL, DB2).
  • Experience with incident and change management processes (e.g., ServiceNow).
  • Bachelor's degree, preferably in Computer Science, Information Technology, Computer Engineering, or related IT discipline; or equivalent experience
  • Limited immigration sponsorship may be available
  • Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve. This may include overnight travel.

Qualifications 

 Preferred  

  • Experience in the healthcare/insurance domain

The wage range for this role takes into account the wide range of factors that are considered in making compensation decisions including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs. The disclosed range estimate has not been adjusted for the applicable geographic differential associated with the location at which the position may be filled. At Deloitte, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $107,900.00-$179,900.00.

Education:Bachelor's DegreeEmployment Type:

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