Senior Software Engineer - C#/.Net

M&T Bank Corporation; Buffalo (NY); Hybrid; USD 97,000 - 162,000; Full time

Job summary

M&T Bank Corporation is seeking a senior software engineer to own applications and services across the full SDLC at the Seneca One Buffalo location with a remote‑friendly cadence. You’ll design, implement, and secure scalable banking solutions, leading cross‑team collaboration and modernization efforts.

The role emphasizes architecture, cybersecurity, and regulatory standards, with mentoring responsibilities and a focus on automation, AI‑assisted tooling, and production stability.

Qualifications

• 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 Duo.
• Experience 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 testing.
• Experience with batch processing and enterprise job scheduling tools such as Automic.

Responsibilities

• Provide technical ownership for applications and services across SDLC.
• Design secure, resilient, maintainable solutions across layers (API, data, batch, integration).
• Lead technical analysis of complex requirements and nonfunctional needs.
• Write production‑quality, optimized code with proper data structures and patterns.
• Use CI/CD, test automation, and deployment tooling to improve delivery.
• Review designs, mentor engineers, and resolve complex issues.
• Coordinate with architecture, cloud, security, and vendor teams end‑to‑end.
• Support cloud modernization, migrations, and dep removals.
• Develop monitoring, documentation, and production readiness evidence.
• Assist in incident response, RCAs, disaster recovery, resiliency improvements.
• Prepare designs, interfaces, and communicate risks and tradeoffs clearly.
• Ensure releases comply with SDLC, governance, and audit requirements.
• Evaluate AI tools and maintain human oversight where needed.
• Identify risks and escalation pathways to management.
• Promote a culture of belonging and brand values.

Skills

C#/.NET

REST APIs

SQL Server/Azure SQL/Redis

Azure Functions

OpenShift/Kubernetes

GitLab CI/CD

Unit testing (NUnit/JUnit)

Automation & DevOps

Education

Bachelor's degree in a relevant field

Associate’s degree + 5 years exp

Tools

Azure Functions

Blob Storage

Application Insights

Dynatrace

GitLab

Artifactory/SonarQube

Job description

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

Primary Responsibilities

• 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.

Supervisory/Managerial Responsibilities

No supervisory responsibilities.

Education and Experience Required

• 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 Duo.
• Experience 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 testing.
• Experience with batch processing and enterprise job scheduling tools such as Automic.

Education and Experience Preferred

• 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.

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.

Location Buffalo, New York, United States of America Great companies have an enduring sense of purpose.

Great companies have an enduring sense of purpose. At M&T, our purpose is a simple one: make a difference in people’s lives and uplift the communities we serve. M&T Bank Corporation is a financial holding company headquartered in Buffalo, New York. M&T’s affiliates offer advice, guidance, expertise and solutions across the entire financial spectrum, combining M&T Bank’s traditional banking services with the wealth management and institutional capabilities offered by Wilmington Trust. M&T Bank has a network of over 1,000 branches and 2,200 ATMs that span 12 states from Maine to Virginia and Washington, D.C. For more than 165 years, M&T has strived to take an active role in our communities and build long‑lasting relationships with our customers. We are a bank for communities—combining the capabilities of a large bank with the care of a locally focused institution. As an employer of choice, we are proud to offer competitive benefits ranging from medical and retirement to forty hours of paid volunteer time, each year. Our core values – integrity, ownership, collaboration, curiosity, and candor – drive the work we do. We seek to further build upon our record of success by bringing in top talent and fresh skill sets while continuing to support the growth and development of all our team members.

M&T Bank is unwavering when it comes to providing equal employment opportunities to all employees and applicants without regard to race, color, national origin, religion, ethnicity, sex, gender identity, age, disability, citizenship, pregnancy, veteran status, military status, marital status, sexual orientation, genetic information or any other characteristic protected under applicable federal, state or local laws.

M&T Bank Corporation has policies and procedures in place to promote a drug free workplace.