Senior Mainframe Development Engineer

• Drive modernization of legacy mainframe applications (Assembler and COBOL) with a strong focus on developer experience (DX), automation, and DevOps adoption
• Design and implement CI/CD pipelines for mainframe workloads, integrating legacy systems into modern DevOps and platform engineering practices
• Enable AI-assisted development and modernization, including the use of AI for code analysis, refactoring, documentation, test generation, and modernization acceleration
• Partner with platform, DevOps, and SRE teams to embed observability, reliability, and security into modernized mainframe applications
• Capture and codify legacy system knowledge to enable AI-driven insights and ensure knowledge is accessible to the next generation of engineers
• Serve as a technical leader and advocate for modern engineering practices on the mainframe, mentoring teams and helping shift culture toward automation-first and continuous delivery models, * This role requires flexibility to work overtime or off-hours that includes weekends and holidays
• This role requires use of a computer and audio equipment

Sponsorship:

• In order to be considered, you must be legally authorized to work in the U.S. without need for visa sponsorship now or in the future

This role is not eligible to be performed in Colorado, California, District of Columbia, Hawaii, Illinois, Massachusetts, Maryland, Minnesota, New Jersey, New York, Nevada, Rhode Island or Washington.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

Please note that salary ranges provided for this role on external job boards are salary estimates made by outside parties and may not be accurate.

• 8+ years of mainframe transactional, batch, and core processing systems. Demonstrated success modernizing, refactoring, or translating legacy codebases into modern architectures or languages
• 5+ years of experience with modern software development practices, including version control, structured testing, and CI/CD pipelines
• 5+ years of experience with modern languages (e.g., Java, Python), API-based architectures, cloud or hybrid environments, and enterprise integration patterns
• Bachelor's degree in computer science, information technology, or a related field, and/or equivalent military experience

Experience that would be great to have:

• Experience collaborating across architecture, platform, DevOps, and application teams in large enterprise environments
• Ability to analyze complex systems with limited documentation and clearly articulate legacy logic to modern engineering teams
• Experience in the financial services industry

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.