Senior Software Engineer - Mainframe

This is an exciting opportunity for a Senior Software Engineer who enjoys working at the intersection of critical mainframe systems and modern engineering practices. In this role, you'll support highly visible platforms across Commercial Bank, Wealth, Private Banking, and Treasury while playing a key role in modernizing the mainframe ecosystem.

Beyond strong COBOL and Easytrieve skills, this position offers opportunity to lead the migration from legacy code management to devops pipeline transformation, automation, API enablement, cloud integration, and realtime data streaming off the mainframe-work that has rarely been done in traditional mainframe environments.

You'll collaborate closely with senior technical leaders and industry experts, contribute to new development and enhancements, and help shape the future of the platform by leveraging industryleading technologies such as IBM's zDIH (z/OS Data Integration Hub). For an engineer passionate about mainframe technology who also wants to build futureready skills and have meaningful impact, this role offers both stability and innovation in equal measure.

Key Responsibilities

• Design, develop, and maintain highquality mainframe applications and batch processes.
• Work extensively with COBOL, JCL, JSCAN, EZTRIEVE, TSO Utilities, CA7, FILEAID, XPEDITER, and ABEND-AID.
• Partner with architecture and DevOps teams to establish and optimize a modern DevOps pipeline for mainframe code (CI/CD, automated testing, change automation).
• Troubleshoot complex production issues, ensuring reliability and performance of missioncritical systems.
• Collaborate with cross-functional teams on analysis, design, testing, and implementation of solutions.
• Leverage IBM's new zDIH technology to improve data integration, analytics accessibility, and modernization initiatives.
• Receive mentoring from our most senior engineers-experts with decades of mainframe experience-and progressively mentor junior team members.
• Participate in code reviews, architecture discussions, and continuous improvement of engineering practices.

Required Qualifications

• Associate's degree and a minimum of 5 years' systems analysis and/ or application development work experience or Bachelor's degree and a minimum of 3 years' systems analysis and/ or application development work experience. In lieu of degree, a combined minimum of 7 years' education and/or relevant work experience, including a minimum of 3 years' systems analysis and/or application development work experience
• Advanced proficiency in:
  • COBOL
  • JCL / JSCAN
  • EZTRIEVE
  • TSO/ISPF Utilities
  • CA7
  • FILEAID
  • XPEDITER
  • ABEND-AID
• Strong understanding of batch processing, data flows, and performance tuning.
• Proven ability to troubleshoot complex system issues in large-scale environments.
• Excellent communication and collaboration skills.

Preferred Qualifications

• Experience contributing to or setting up DevOps/CI/CD pipelines for mainframe workloads (e.g., Git, SonarQube, SonarLint, ADDI, Ansible).
• Familiarity with IBM's zDIH or other mainframe modernization and integration technologies.
• Exposure to cloud integration, API enablement, or data virtualization initiatives.
• Background in financial services, insurance, or other highavailability industries.

What We Offer

• The chance to work directly with some of our most senior engineers, gaining expertise from industry veterans.
• Opportunities to lead modernization initiatives and influence our mainframe engineering roadmap.
• A collaborative environment that values innovation, craftsmanship, and continuous learning.
• Competitive compensation, benefits, and professional development support.

#LI-JB3

M&T Bank is committed to fair, competitive, and market-informed pay for our employees. The pay range for this position is $97,100.00 - $161,800.00 Annual (USD). The successful candidate's particular combination of knowledge, skills, and experience will inform their specific compensation.LocationBuffalo, New York, United States of America