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Mainframe Developer Jobs in Milwaukee, WI (NOW HIRING)

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 ...

The Software Developer designs, develops, and deploys modern, AI-driven solutions that enhance collaboration, automation, and knowledge access across the organization. This role focuses on ...

New

InvestCloud (formerly Advicent) is looking for a talented and motivated Software Developer II to join our team. You will deliver and support our web-based financial planning applications using ...

Application Developer

Milwaukee, WI · Remote

$40 - $75/hr

Our platform offers an engaging blend of flexibility and challenge: you'll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging ...

Software Developer

Milwaukee, WI · Remote

$40 - $75/hr

Our platform offers an engaging blend of flexibility and challenge: you'll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging ...

Application Developer

Kenosha, WI · Remote

$40 - $75/hr

Our platform offers an engaging blend of flexibility and challenge: you'll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging ...

Senior Software Developer

Milwaukee, WI · On-site

$53.75 - $71/hr

InvestCloud (formerly Advicent) is looking for a talented and motivated Senior Software Developer to join our team. You will deliver and support our web-based financial planning applications using ...

Software Developer

Kenosha, WI · Remote

$40 - $75/hr

Our platform offers an engaging blend of flexibility and challenge: you'll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging ...

Senior Optimization Developer

Waukesha, WI · On-site

$86K - $126K/yr

The Senior Developer will be part of a dynamic work environment and be challenged to develop programming code and programs to support the automatic design and manufacturing processes for the ...

Senior WMS Software Developer

Milwaukee, WI · On-site

$110K - $126K/yr

Quest Global delivers world-class end-to-end engineering solutions by leveraging our deep industry knowledge and digital expertise. By bringing together technologies and industries, alongside the ...

Senior WMS Software Developer

Milwaukee, WI · On-site

$110K - $126K/yr

Quest Global delivers world-class end-to-end engineering solutions by leveraging our deep industry knowledge and digital expertise. By bringing together technologies and industries, alongside the ...

InvestCloud (formerly Advicent) is looking for a talented and motivated Software Developer II to join our team. You will deliver and support our web-based financial planning applications using ...

Working closely with developers, analysts, QA automation, and business partners, you'll help build high-quality, scalable solutions using Microsoft-based technologies while contributing to our ...

Working closely with developers, analysts, QA automation, and business partners, you'll help build high-quality, scalable solutions using Microsoft-based technologies while contributing to our ...

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Mainframe Developer information

See Milwaukee, WI salary details

$9

$52

$71

How much do mainframe developer jobs pay per hour?

As of Jun 10, 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 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.

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 are Mainframe Developers?

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, and why are they important?

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 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:
Infographic showing various Mainframe Developer job openings in Milwaukee, WI as of June 2026, with employment types broken down into 62% Full Time, 25% Part Time, and 13% Contract. Highlights an 83% Physical, 7% Hybrid, and 10% Remote job distribution, with an average salary of $109,388 per year, or $52.6 per hour.
Software developer/ Insiteplus developer

Software developer/ Insiteplus developer

Collabera

Waukesha, WI • On-site

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted 4 days ago


Job description

Company Description

Established in 1991, Collabera has been a leader in IT staffing for over 22 years and is one of the largest diversity IT staffing firms in the industry. As a half a billion dollar IT company, with more than 9,000 professionals across 30+ offices, Collabera offers comprehensive, cost-effective IT staffing & IT Services. We provide services to Fortune 500 and mid-size companies to meet their talent needs with high quality IT resources through Staff Augmentation, Global Talent Management, Value Added Services through CLASS (Competency Leveraged Advanced Staffing & Solutions) Permanent Placement Services and Vendor Management Programs. 

Collabera recognizes true potential of human capital and provides people the right opportunities for growth and professional excellence. Collabera offers a full range of benefits to its employees including paid vacations, holidays, personal days, Medical, Dental and Vision insurance, 401K retirement savings plan, Life Insurance, Disability Insurance.

Job Description

Position Details: 

Location Waukesha, WI 

Job Title InSite Plus Developer (Java developer)

Duration 12+ months 

Job Description:

Develop resource needed to help in the design and development of a new InSite Connectivity management platform for tracking and testing of our connection to the products in the field. This will be an integrated global desktop for connectivity tools, data and workflow into one system. This is based off a started implantation within the AM, but will be moved to be the new global platform for pulling into one area. We need to roll in the other regions and continue to build out the existing and new features required. On key feature will be Site Monitoring - We are looking at monitoring our connections and functionality to the sites for uptime and build in automated special testing and fixes as we find known failure modes.. Will need to integrate to InSitePlus for systems, testing and results.


Qualifications

Software development resource for InSitePlus: 

Java (Predix working knowledge would be a plus) 

Web development 

o PHP / Javascript / Ajax 

o API integration 

o Jquery (and plugins) 

o Bootstrap 

o CSS Styling 

o XML/XSL transformation 

o Database connectivity 

Web design skills 

Linux/Windows batch programming 

SQL proficiency 

DB scripting 

DB performance troubleshoot - basic

Additional Information

If you are interested please send me your updated copy of resume, to know more about this position:

Ujjwal Mane

973-805-7557

ujjwal.mane(at)collabera.com