Senior Software Engineer - C#/.Net

This role is four days onsite at our Seneca One Buffalo, NY location, with the flexibility to work from home one day per week

Responsible for advanced software engineering and technical ownership of applications and services supporting critical banking capabilities. Designs, develops, integrates, deploys, and supports secure and resilient solutions throughout the Software Development Lifecycle (SDLC). Independently analyzes complex business and technical requirements, leads implementation decisions, coordinates dependencies across teams and vendors, and ensures solutions meet the Bank’s architecture, cybersecurity, risk, operational, and regulatory standards. Contributes to platform modernization, production stability, engineering automation, responsible use of approved AI-assisted engineering tools, and the technical development of other team members.

• Provide technical ownership for applications and services throughout design, development, testing, deployment, production support, modernization, and retirement.
• Design and implement secure, resilient, maintainable solutions across application, API, data, batch and file-processing, and integration layers.
• Lead technical analysis of complex business requirements, system dependencies, operational constraints, and nonfunctional requirements such as availability, recovery, performance, security, and supportability.
• Author organized, efficient, secure, and production-quality source code at an advanced level, applying appropriate data structures, algorithms, design patterns, and engineering standards.
• Use source code management, automated testing, continuous integration and delivery, code-quality tooling, and deployment automation to manage changes and improve delivery reliability.
• Review code and technical designs, provide constructive feedback, establish engineering standards, mentor team members, and help resolve complex implementation and support issues.
• Collaborate with architecture, infrastructure, cloud, network, cybersecurity, database, operations, business, and vendor teams to manage dependencies and deliver end-to-end solutions.
• Support cloud and platform modernization initiatives, including application migration, dependency remediation, technical-debt reduction, and retirement of legacy components.
• Develop and maintain monitoring, alerting, operational documentation, implementation plans, support procedures, and production-readiness evidence.
• Troubleshoot complex application and integration issues across environments; participate in incident response, root-cause analysis, corrective actions, disaster recovery, and resiliency improvements.
• Prepare and maintain technical designs, architecture flows, interface specifications, implementation plans, and support documentation, and clearly communicate recommendations, tradeoffs, risks, estimates, and dependencies.
• Ensure releases comply with SDLC, change-management, cybersecurity, audit, and regulatory requirements, including timely remediation or escalation of identified risks.
• Use approved AI-assisted engineering tools to support software design, development, testing, documentation, code review, troubleshooting, and operational analysis while independently validating outputs for accuracy, security, maintainability, licensing, and compliance with Bank standards.
• Evaluate emerging engineering capabilities, including generative AI, to identify appropriate opportunities to improve developer productivity, software quality, automation, and operational support while protecting confidential information and maintaining human oversight.
• Understand and adhere to the Company’s risk and regulatory standards, policies and controls in accordance with the Company’s Risk Appetite. Identify risk-related issues needing escalation to management.
• Promote an environment that supports a culture of belonging and reflects the M&T Bank brand.
• Maintain M&T internal control standards, including timely implementation of internal and external audit points together with any issues raised by external regulators as applicable.
• Complete other related duties as assigned.

No supervisory responsibilities.

• 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 C# and .Net programming languages
• Experience designing and consuming REST APIs and working with JSON
• Proficiency with Microsoft SQL Server, Azure SQL, and Redis
• Hands-on experience with Azure Functions, Blob Storage, Application Insights, and Dynatrace
• Experience working with OpenShift, containers, Helm, and Kubernetes in cloud-native environments
• Familiarity with source control and DevOps practices using GitLab, GitLab CI/CD, and GitLab DuoExperience with code quality and artifact management tools such as JFrog Artifactory and SonarQube
• Knowledge of automated testing frameworks including NUnit/JUnit and automated API/unit testingExperience with batch processing and enterprise job scheduling tools such as Automic

• Experience supporting business-critical applications in a regulated environment.
• Experience with cloud platforms, distributed applications, APIs, databases, batch processing, managed file transfer, and enterprise integration patterns.
• Experience with Git-based development, continuous integration and delivery pipelines, automated testing, configuration or infrastructure automation, and code-quality tooling.
• Knowledge of application security, identity and access, certificate management, vulnerability remediation, networking fundamentals, and secure data transmission.
• Experience with observability, incident response, root-cause analysis, disaster recovery, resiliency, and production-readiness practices.
• Experience using approved AI-assisted development tools to accelerate engineering tasks while maintaining accountability for resulting code, documentation, and technical decisions.
• Ability to lead technical discussions, document architecture and implementation decisions, mentor engineers, and communicate risks and tradeoffs to technical and nontechnical audiences.
• Experience coordinating technical delivery across internal teams, third-party vendors, and dependent platforms.
• Strong analytical, organizational, time-management, verbal communication, and written communication skills, with the ability to work autonomously across multiple complex priorities.