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Freelance Mainframe Applications Developer Jobs in Milwaukee, WI

Accenture

Mainframe Specialist

Milwaukee, WI

$70K - $196K/yr

Lead the design, development, and modernization of mainframe applications, enforcing best practices ... Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ...

Wipro Limited

Mainframe Developer

Brookfield, WI · On-site

$60K - $135K/yr

Mainframe Developer City: Brookfield State/Province: Wisconsin Posting Start Date: 6/29/26 Wipro ... Applications from veterans and people with disabilities are explicitly welcome. Reinvent your world.

Wipro Limited

Mainframe Developer

Brookfield, WI · On-site

$60K - $135K/yr

Mainframe Developer City: Brookfield State/Province: Wisconsin Posting Start Date: 7/6/26 Wipro ... Applications from veterans and people with disabilities are explicitly welcome. Reinvent your world.

Sonsoft Inc

Mainframe Architect

Milwaukee, WI · On-site

... solution (DevOps). * Familiarity and experience with design, setup and management of Dev, QA & Production Environments for high availability distributed applications with very large user base.

Sonsoft Inc

Mainframe Architect

Milwaukee, WI

... (DevOps) Familiarity and experience with design, setup and management of Dev, QA & Production Environments for high availability distributed applications with very large user base Leadership and ...

TIER4 GROUP

Software Integration Engineer

Franklin, WI · Hybrid

$96K - $130K/yr

Build and maintain infrastructure applications using Python and Java. * Scripting & Automation ... Proficiency in IBM MQ (Linux, MQ Appliance, Mainframe MQ preferred). * Strong skills in Python ...

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 ...

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How much do freelance mainframe applications developer jobs pay per hour?

As of Jul 31, 2026, the average hourly pay for freelance mainframe applications developer in Milwaukee, WI is $48.22, according to ZipRecruiter salary data. Most workers in this role earn between $42.88 and $56.15 per hour, depending on experience, location, and employer.
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Freelance Mainframe Applications Developer jobs near you
Infographic showing various Freelance Mainframe Applications Developer job openings in Milwaukee, WI as of July 2026, with employment types broken down into 47% Full Time, 7% Part Time, 4% Temporary, and 42% Contract. Highlights an 77% In-person, and 23% Remote job distribution, with an average salary of $100,297 per year, or $48.2 per hour.

Senior Mainframe

Cognizant Technology Solutions

Brookfield, WI • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

This job post has expired today. Applications are no longer accepted.

Cognizant rating

7.4

Company rating: 7.4 out of 10

Based on 85 frontline employees who took The Breakroom Quiz

52nd of 72 rated business consultants

Job description

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About the role
As a Mainframe Engineering , you will make an impact by leading the delivery, modernization, and optimization of enterprise-scale mainframe applications that support critical card and payment processing platforms. You will be a valued member of the Engineering leadership team and work collaboratively with product owners, architects, business stakeholders, infrastructure teams, and engineering partners to deliver resilient, scalable, and high-performing solutions.
In this role, you will:
  • Lead the end-to-end delivery of complex mainframe solutions using COBOL, JCL, and DB2, ensuring quality, reliability, and timely execution of business priorities.
  • Guide solution architecture and technical design for high-volume transactional and batch workloads, driving performance, scalability, and maintainability.
  • Partner with product owners, business analysts, architects, and stakeholders to translate business requirements into effective technical solutions while minimizing delivery risk.
  • Drive engineering excellence through code reviews, development standards, testing practices, performance optimization, and continuous improvement initiatives.
  • Manage, mentor, and develop engineering teams in a hybrid work environment, fostering collaboration, accountability, and technical growth.
Work model
We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role's business requirements, this is a hybrid position requiring attendance in a client or Cognizant office as determined by project and business needs. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.
The working arrangements for this role are accurate as of the date of posting. This may change based on the project you're engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.
What you need to have to be considered
  • Extensive experience designing, developing, and supporting enterprise mainframe applications using COBOL, JCL, and DB2 in large-scale production environments.
  • Strong expertise in DB2 database design, SQL optimization, performance tuning, and troubleshooting across transactional and batch processing systems.
  • Proven experience leading engineering teams, managing delivery plans, coordinating dependencies, and driving stakeholder alignment across complex initiatives.
  • Hands-on experience supporting cards and payments platforms, including transaction processing, authorization, clearing, settlement, or related payment flows.
  • Strong understanding of application performance optimization, production support, incident management, and root-cause analysis in mission-critical environments.
  • Experience establishing development standards, code review practices, testing strategies, and quality controls for mainframe engineering teams.
  • Excellent communication and collaboration skills with the ability to engage both technical and non-technical stakeholders.
  • Experience working within regulated environments with knowledge of security, compliance, risk, and audit requirements.
  • Bachelor's degree in Computer Science, Information Systems, Engineering, or a related field, or equivalent professional experience.
These will help you stand out
  • Experience modernizing or refactoring legacy COBOL and JCL applications.
  • Knowledge of mainframe integration patterns supporting enterprise payment ecosystems and distributed platforms.
  • Experience improving deployment automation, job scheduling, release management, and operational efficiency across mainframe environments.
  • Familiarity with engineering metrics, including cycle time, defect leakage, environment stability, and operational performance indicators.
  • Experience implementing reusable frameworks, automation, and continuous improvement programs within mainframe delivery organizations.
  • IBM certifications, including IBM Certified Application Developer (CICS), IBM DB2 certifications, or equivalent mainframe engineering credentials.

Benefits:
Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
  • Medical/Dental/Vision/Life Insurance.
  • Paid holidays plus Paid Time Off.
  • 401(k) plan and contributions.
  • Long-term/Short-term Disability.
  • Paid Parental Leave.
  • Employee Stock Purchase Plan.

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role
About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization's unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.
Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.
If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] for roles based in the Americas or [email protected] for roles based in India.

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