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Senior Mainframe Developer Jobs in Wisconsin (NOW HIRING)

WI · On-site

Advises senior management on technical strategy. Researches and recommends new technologies. Works ... mainframe-based applications to a modern distributed tech stack. DE architecting and engineering ...

Senior Software Engineer

Wausau, WI · On-site

$91K - $163K/yr

Solid understanding of software engineering processes: Design patterns, algorithms, data structures ... Required Qualifications: * 5+ years of experience in Mainframe technologies (FSE) * 5+ years of ...

Senior Software Engineer

Wausau, WI · Remote

$91K - $163K/yr

Solid understanding of software engineering processes: Design patterns, algorithms, data structures ... Required Qualifications: * 5+ years of experience in Mainframe technologies (FSE) * 5+ years of ...

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 ...

Senior Software Engineer

Wausau, WI · Remote

$91K - $163K/yr

Solid understanding of software engineering processes: Design patterns, algorithms, data structures ... Required Qualifications: * 5 years of experience in Mainframe technologies (FSE) * 5 years of ...

WI · On-site

... with senior developers and cross‑functional teams to deliver robust, scalable systems. Provide ... Mainframe: PL/I or Cobol, DB2, MQ, CICS. * Nice to have: * Java / .NET / APIs / Integration.

Showing results 21-30

Senior Mainframe Developer information

See Wisconsin salary details

$38

$58

$67

How much do senior mainframe developer jobs pay per hour?

As of Sep 13, 2026, the average hourly pay for senior mainframe developer in Wisconsin is $58.19, according to ZipRecruiter salary data. Most workers in this role earn between $54.62 and $63.56 per hour, depending on experience, location, and employer.

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.

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 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 the most commonly searched types of Mainframe Developer jobs in Wisconsin?

The most popular types of Mainframe Developer jobs in Wisconsin are:

What are popular job titles related to Senior Mainframe Developer jobs in Wisconsin?

For Senior Mainframe Developer jobs in Wisconsin, the most frequently searched job titles are:

What job categories do people searching Senior Mainframe Developer jobs in Wisconsin look for?

The top searched job categories for Senior Mainframe Developer jobs in Wisconsin are:

What cities in Wisconsin are hiring for Senior Mainframe Developer jobs?

Cities in Wisconsin with the most Senior Mainframe Developer job openings:

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

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

Infographic showing various Senior Mainframe Developer job openings in Wisconsin as of August 2026, with employment types broken down into 84% Full Time, 5% Part Time, and 11% Contract. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $121,038 per year, or $58.2 per hour.

Director, Architecture

WI • On-site

Other

Re-posted yesterday


Job description

Job Description

Note: Fidelity will not provide immigration sponsorship for this position.

Position Description

Oversees the architecture of distributed systems and applications in a cloud environment utilizing Amazon Web Services (AWS) and Azure cloud technologies. Directs the implementation of Continuous Integration and Continuous Delivery pipelines (CI/CD) leveraging automated testing technologies -- Maven and Git. Develops web applications utilizing coding languages -- CSS, JAVA, and HTML. Works with Application Program Interface (API) protocols in the development and management of microservices architecture, infrastructure, data architecture, security, and new technologies. Draws on in-depth knowledge of advanced principles, theories, and concepts to implement scalable solutions. Consults with development architects and business on internal service quality control standards, policies, and procedures.

Primary Responsibilities

Provides leadership to the product teams through software application architecture designs, adoption of standards, collaboration with key partners and evaluations and recommendations of solutions. Works closely with business partners and technology teams to understand business objectives and define appropriate architecture direction. Ensures technology decisions align with enterprise standards and strategy. Establishes strategic direction, setting standards and choosing technologies. Analyzes business direction and challenges to understand long term vision and risks, enabling the development of strategic technical solutions. Works closely with product and application teams in technology evaluation, selection, recommendation, and configuration. Designs, develops and modifies complex and major software systems, using scientific analysis and mathematical models to predict and measure outcome and consequences of design. Develops and directs software system testing and validation procedures, programming, and documentation. Sets vision, goals, and direction of team/organization. Plans and leads organization-wide initiatives. Provides leadership, technical supervision, and expertise to multiple teams in broad technical areas on complex organization-wide projects. Advises senior management on technical strategy. Researches and recommends new technologies. Works across groups to identify opportunities for organization-wide technology initiatives. Regularly provides guidance, training, and coaching to other team members for performance and career development. Identifies and plans for future resource needs. Determines technical approaches at a strategic level for the business unit.

Education and Experience

Bachelor’s degree in Computer Science, Engineering, Information Technology, Information Systems, or a closely related field (or foreign education equivalent) and six (6) years of experience as a Director, Architecture (or closely related occupation) developing distributed applications within a financial services environment, supporting workplace investment and benefits programs. Or, alternatively, Master’s degree in Computer Science, Engineering, Information Technology, Information Systems, or a closely related field (or foreign education equivalent) and four (4) years of experience as a Director, Architecture (or closely related occupation) developing distributed applications within a financial services environment, supporting workplace investment and benefits programs.

Skills and Knowledge

Candidate must also possess: Demonstrated Expertise (“DE”) utilizing domain driven design to create APIs and microservices in REST and SOAP formats, using Java and C# (.Net), adhering to API standards, and following security guidelines that meet industry and regulatory requirements. DE participating in large scale mainframe modernization initiatives, including re-platforming, refactoring, and advising on data strategies (data retrievals from mainframe), using Java based wrappers and native DB2 stored procedures; and following the right architectural patterns to modernize mainframe-based applications to a modern distributed tech stack. DE architecting and engineering enterprise level, multi-Cloud-based platforms built on Docker, Kubernetes, and Elastic Kubernetes Service (EKS and AKS) to enable teams to deploy dynamic full stack applications on cloud service platforms (AWS and Azure), handling fluctuations in application traffic driven by customer actions -- trading and money movement. DE architecting event driven applications with asynchronous and high-volume workloads using Kafka, AWS SQS, and Lambda functions; and designing rules engines to abstract business logic for the rules using DROOLS/ODM.

#PE1M2 #LI-DNI Fidelity’s Onsite Working Model

Fidelity is transitioning to a full-time onsite working model through a phased rollout across regions and roles. Currently, some roles and locations require 100% onsite presence, while others require less. Onsite expectations are likely to evolve as the rollout continues. This transition does not apply to fully remote roles.

Certifications

Category: Information Technology Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories. At Fidelity, we are passionate about making our financial expertise broadly accessible and effective in helping people live the lives they want! We are a privately held company that places a high degree of value in creating and nurturing a work environment that attracts the best talent and reflects our commitment to our associates. We are proud of our diverse and inclusive workplace where we respect and value our associates for their unique perspectives and experiences. For information about working at Fidelity, visit FidelityCareers.com. Fidelity Investments is an equal opportunity employer. Fidelity will reasonably accommodate applicants with disabilities who need adjustments to participate in the application or interview process. To initiate a request for an accommodation please contact the following: For roles based in the US: Contact the HR Leave of Absence/Accommodation Team by sending an email to accommodations@fmr.com, or by calling 800-835-5099, prompt 2, option 2 For roles based in Ireland: Contact AccommodationsIreland@fmr.com For roles based in Germany: Contact Accommodationsgermany@fmr.com Fidelity Privacy Policy

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