Senior Software Engineer - Mainframe

MainframeMaster; Buffalo, Northern (NY, KY); Hybrid; USD 120,000 - 180,000; Full time

Job summary

M&T Bank is seeking a Senior Mainframe Software Engineer to support the enhancement, maintenance, modernization, and production support of mission-critical mainframe applications. This role designs, develops, tests, and implements changes using IBM mainframe technologies, serving as a key contributor on complex initiatives.

The successful candidate will partner with business and technology stakeholders, promote DevOps practices, and ensure systems remain stable, secure, and compliant while

Qualifications

• Experience with IBM mainframe technologies and production support.
• Familiarity with Agile delivery and DevOps practices.
• Ability to analyze complex systems and guide engineering efforts.

Responsibilities

• Analyze, design, develop, test, deploy, and support mainframe applications.
• Prepare user stories, acceptance criteria, and test plans for Agile delivery.
• Evaluate dependencies across programs, interfaces, vendors, and business processes.
• Provide analytical guidance to identify effective technology solutions.
• Follow development standards, Agile and DevOps practices, and change controls.
• Deploy mainframe components through automated pipelines and perform root cause analysis.
• Coordinate tasks and communicate status with partners, teams, and vendors.
• Mentor engineers and share knowledge to strengthen the team.
• Participate in on-call/production support to ensure availability and stability.
• Maintain understanding of business processes and uphold brand values.

Skills

Mainframe tech

Agile methods

DevOps practices

Mentoring

Tools

IBM z/OS

CICS

DB2

Job description

Job Description: M&T Bank is seeking a Senior Mainframe Software Engineer to support the enhancement, maintenance, modernization, and production support of mission-critical mainframe applications. This role is responsible for designing, developing, testing, implementing, and supporting application changes using IBM mainframe technologies. The engineer will serve as a key individual contributor on complex initiatives, partner with business and technology stakeholders, and help ensure that supported applications remain stable, secure, compliant, and aligned with business objectives.

Key Responsibilities

• Complete and oversee basic to complex systems analysis, design, development, testing, debugging, implementation, and production support activities.
• Prepare and review user stories, acceptance criteria, technical documentation, test plans, estimates, impact assessments, and system documentation in support of Agile delivery.
• Evaluate interrelationships and dependencies across programs, interfacing applications, vendors, platforms, and business processes.
• Provide analytical consultation to identify effective technology solutions that support strategic business goals.
• Follow and promote M&T development standards, Agile practices, DevOps practices, change management processes, and risk and regulatory controls.
• Deploy mainframe components through automated pipelines and support issue identification, root cause analysis, and problem resolution.
• Coordinate development tasks, communicate status and risks clearly, and collaborate with business partners, application teams, operations, and vendor partners.
• Provide technical guidance, mentoring, and knowledge sharing to less experienced engineers.
• Participate in on-call or off-hours production support as needed to maintain application availability and stability.
• Maintain a strong understanding of the business processes supported by the application and promote an inclusive environment consistent with the M&T Bank brand.

Collaboration and Leadership Expectations

The successful candidate should demonstrate strong communication, ownership, analytical thinking, and problem-solving skills. This role requires the ability to work independently, collaborate across teams, communicate technical concepts clearly, and support continuous improvement in delivery quality, operational stability, and engineering practices.