Senior Software Engineer - Mainframe

Overview

Responsible at the expert level for mainframe software engineering, technical solution delivery, and technical requirements definition. Serves as an individual‑contributor technical lead for critical mainframe applications and platforms.

• Technical Leadership & Engineering Delivery
  • Lead technical design, development, enhancement, and support of mainframe applications while ensuring SDLC governance.
  • Own technical decisions and delivery quality for assigned platforms, work streams, or application domains.
  • Partner with business and technology stakeholders to align delivery with priorities, requirements, risk controls, and enterprise standards.
• Software Engineering Excellence
  • Deliver secure, efficient, maintainable, and resilient code using enterprise mainframe technologies.
  • Lead mainframe design, troubleshooting, performance tuning, and support across batch and online processing.
  • Establish coding standards, development practices, and quality expectations for maintainability, performance, security, and resiliency.
• SDLC, Dev Ops & Quality Engineering
  • Review and approve solution designs, pull requests, code changes, peer reviews, source control practices, and deployment readiness.
  • Define test strategy for mainframe changes, including batch validation, regression testing, data reconciliation, performance checks, and implementation verification.
  • Promote CI/CD, functional automation, standardization, and Dev Ops practices to improve productivity and reduce manual effort.
• Technical Requirements & Solution Design
  • Ensure requirements, solution designs, and implementation plans are complete, feasible, scalable, secure, and aligned with business and technical standards.
  • Guide architecture, integration patterns, modernization, engineering processes, and technical decision‑making across mainframe and connected platforms.
  • Translate complex mainframe constraints into business, delivery, risk, and operational impacts while resolving technical blockers.
• Operational Excellence & Modernization
  • Drive mainframe modernization, including API enablement, data integration, Dev Ops adoption, technical debt reduction, and incremental refactoring.
  • Own technical health by improving resiliency, reducing defects, addressing technical debt, and guiding remediation plans.
  • Ensure production readiness for batch schedules, online transactions, restart/recovery, monitoring, support documentation, and reliability improvements.
  • Apply AI‑assisted engineering and automation responsibly across SDLC and operational processes where appropriate.
• Communication & Collaboration
  • Communicate architecture, technical decisions, progress, risks, and challenges clearly to technical and business stakeholders.
  • Influence technical decisions across teams without direct authority and present solutions in architecture reviews, forums, and knowledge‑sharing sessions.
  • Maintain documentation and partner across business, product, architecture, infrastructure, security, operations, risk, and audit teams.
  • Ensure technical changes comply with company risk, regulatory, policy, change management, security, data protection, access control, and operational risk standards.
  • Escalate risk‑related issues as needed and address audit and regulatory items on time.
  • Support a culture of belonging, reflect the M&T Bank brand, maintain internal controls, and complete other assigned duties.
• Scope of Responsibilities
  • Serve as an individual‑contributor technical lead accountable for technical direction, design quality, code review, modernization guidance, and production stability; this role does not include direct people management.
  • Own technical outcomes for assigned mainframe applications, platforms, work streams, or domains, including solution design, delivery quality, operational readiness, and risk remediation.
  • Influence engineers, architects, product, operations, security, infrastructure, risk, and audit partners through technical expertise, documentation, standards, and collaboration.

Associate’s degree and a minimum of 5years of systems analysis and/or application development work experience, or Bachelor’s degree and a minimum of 3years…