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Mainframe Developer Jobs in Milwaukee, WI (NOW HIRING)

TIER4 GROUP

Software Integration Engineer

Franklin, WI · Hybrid

$96K - $130K/yr

Proficiency in IBM MQ (Linux, MQ Appliance, Mainframe MQ preferred). * Strong skills in Python, Java, Shell Scripting, and Git. * Experience in reverse engineering and system analysis. * Familiarity ...

Fiserv, Inc.

Quality Assurance Engineer

Milwaukee, WI · On-site

... mainframe systems, on-prem and cloud environments. Detect, diagnose, and resolve performance ... Using GIT, GITHub, Jenkins, Azure DevOps, and Gitlab; Working with QA methodologies and automation ...

FIS

Engineer Sr Lead, Systematics

Milwaukee, WI

Demonstrated ability to adapt to different mainframe/client environments and mainframe tool sets. Bonus if you have: * Minimum of 10 years experience working on FIS Systematics applications with ...

mcts

SOFTWARE DEVELOPER

Milwaukee, WI · On-site

The Software Developer will provide full application life cycle development including but not limited to analysis, design, programming, system implementation, training, and documentation for ...

mcts

SOFTWARE DEVELOPER

Milwaukee, WI · On-site

The Software Developer will provide full application life cycle development including but not limited to analysis, design, programming, system implementation, training, and documentation for ...

Atria Group LLC

Application Developer

Milwaukee, WI

Our company provides application analysis, design, development and programming, software engineering, systems development, testing, integration, and implementation, and management consulting services ...

idexcel

Software Developer II

Milwaukee, WI

Developer II is responsible for the development of software. Essential Responsibilities Duties include (but are not limited to): As a software developer understand needs and translate those to viable ...

LRS

Software Developer

Milwaukee, WI

$50 - $70/hr

Codeworks, an LRS company, is seeking a Software Developer who enjoys solving complex challenges, collaborating with diverse teams, and making a meaningful impact through technology and innovation ...

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Mainframe Developer information

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How much do mainframe developer jobs pay per hour?

As of Sep 13, 2026, the average hourly pay for mainframe developer in Milwaukee, WI is $52.59, according to ZipRecruiter salary data. Most workers in this role earn between $46.44 and $59.66 per hour, depending on experience, location, and employer.

What is a mainframe developer?

Mainframe Developers are specialized software engineers who design, develop, maintain, and troubleshoot applications on mainframe computer systems, such as IBM's z/OS. They typically work with languages like COBOL, JCL, and CICS, and are responsible for ensuring the performance, security, and reliability of mission-critical business applications. Mainframe Developers are commonly employed in industries like banking, insurance, and government, where large-scale, high-volume transaction processing is essential.

What are the key skills and qualifications needed to thrive as a mainframe developer?

To thrive as a Mainframe Developer, you need expertise in programming languages such as COBOL, JCL, and SQL, along with a strong understanding of mainframe operating systems and batch processing concepts. Familiarity with tools like IBM z/OS, DB2, CICS, and version control systems is typically required, and certifications from IBM or related organizations can be beneficial. Strong problem-solving abilities, attention to detail, and effective communication skills help Mainframe Developers excel in troubleshooting and collaborating with cross-functional teams. These skills are crucial for maintaining, optimizing, and modernizing legacy systems that are vital to many large organizations’ operations.

What are some common challenges mainframe developers face when integrating legacy systems with modern applications?

Mainframe Developers often encounter challenges such as ensuring compatibility between legacy systems and newer technologies, managing data migration without disrupting business operations, and maintaining the security of sensitive data. Effective communication with cross-functional teams, such as application developers and infrastructure engineers, is essential to address these challenges. Staying updated on both mainframe and modern programming practices helps ease integration and ensures long-term system reliability.

What is the difference between Mainframe Developer vs Mainframe Analyst?

AspectMainframe DeveloperMainframe Analyst
Primary RoleDesigning, coding, and testing mainframe applicationsAnalyzing and maintaining existing mainframe systems
Skills & CertificationsCOBOL, JCL, DB2, certifications like IBM Certified DeveloperCOBOL, JCL, system analysis, troubleshooting skills
Work EnvironmentDevelopment teams, coding in mainframe environmentsSupport teams, system analysis, user support
Industry UsageFinancial services, insurance, government agenciesFinancial institutions, healthcare, government agencies

While Mainframe Developers focus on creating and implementing mainframe applications, Mainframe Analysts primarily analyze, troubleshoot, and maintain existing systems. Both roles require similar technical skills and often work within the same industries, but their core responsibilities differ in development versus support and analysis.

Is a mainframe developer a good career?

A mainframe 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 technologies like COBOL and JCL, but it may require ongoing learning of evolving mainframe tools and certifications. Overall, it can be a good career for those interested in enterprise computing and system stability.

Is a mainframe developer hard to learn?

Mainframe developers typically need to learn specialized programming languages like COBOL and understand mainframe environments, which can have a steep learning curve for beginners. However, with prior programming experience and training, acquiring the necessary skills is achievable, and many employers offer on-the-job training or certification programs.

Is mainframe developer still in demand?

Mainframe developers are still in demand in industries such as finance, insurance, and government, where legacy systems remain critical. They typically work with COBOL, JCL, and mainframe environments, and demand depends on the organization's reliance on mainframe technology and ongoing maintenance needs.

What are the most commonly searched types of Mainframe Developer jobs in Milwaukee, WI?

The most popular types of Mainframe Developer jobs in Milwaukee, WI are:

What are popular job titles related to Mainframe Developer jobs in Milwaukee, WI?

For Mainframe Developer jobs in Milwaukee, WI, the most frequently searched job titles are:

What job categories do people searching Mainframe Developer jobs in Milwaukee, WI look for?

The top searched job categories for Mainframe Developer jobs in Milwaukee, WI are:

What cities near Milwaukee, WI are hiring for Mainframe Developer jobs?

Cities near Milwaukee, WI with the most Mainframe Developer job openings:

Mainframe Developer jobs near you
Infographic showing various Mainframe Developer job openings in Milwaukee, WI as of September 2026, with employment types broken down into 82% Full Time, and 18% Contract. Highlights an 91% In-person, and 9% Hybrid job distribution, with an average salary of $109,388 per year, or $52.6 per hour.

Software Integration Engineer

Franklin, WI • Hybrid

TIER4 GROUP
IT Services • 51 - 200 employees
Learn more about TIER4 GROUPexternal

$96K - $130K/yr

Full-time

Re-posted 29 days ago

Job description

Title: Software Integration Engineer

Location: Franklin, WI 

Type: Hybrid (3 days onsite per week) 

Duration: ASAP - December 2025 

Perks: Competitive Rates, Benefits, free daily lunch when onsite 


About the Role:

Join our Messaging team to manage and enhance IBM MQ infrastructure, supporting reliable communication across systems. This role involves implementing approved architecture patterns, developing integration solutions, and contributing to continuous delivery pipelines.


Key Responsibilities:

  • IBM MQ Management: Configure and manage IBM MQ for secure, reliable communication.
  • Software Development: Build and maintain infrastructure applications using Python and Java.
  • Scripting & Automation: Create Shell Scripts to streamline tasks and enhance integrations.
  • Version Control: Utilize Git for source code management and collaboration.
  • Reverse Engineering: Analyze and document existing systems for improvements and troubleshooting.
  • Documentation: Maintain comprehensive technical documentation.
  • CI/CD: Develop and manage CI/CD pipelines for efficient software delivery.
  • API Development: Design and maintain APIs for seamless system integration.
  • Integration Patterns: Apply best practices to ensure maintainable system communication.


Qualifications:

  • Education: Bachelor’s degree in Computer Science, IT, or related field.
  • Experience:
  • Proficiency in IBM MQ (Linux, MQ Appliance, Mainframe MQ preferred).
  • Strong skills in Python, Java, Shell Scripting, and Git.
  • Experience in reverse engineering and system analysis.
  • Familiarity with CI/CD tools and integration patterns.
  • Additional Skills:
  • Problem-solving and troubleshooting expertise.
  • Effective communication and collaboration skills.
  • Knowledge of cloud platforms (AWS preferred).
  • Experience with messaging tools like SQS or RabbitMQ is a plus.


Technical Skills:

  • Must-Have: IBM MQ, Linux Shell Scripting, Python, Reverse Engineering, Analytical Skills.
  • Nice-to-Have: AWS or other cloud platforms.