Senior Software Engineer – Enterprise Design System

Builds and maintains a shared front-end design system (component library and supporting tooling) used across the Bank’s web applications. This role focuses on TypeScript-based component engineering, Node.js-powered build/test/release pipelines, accessibility and quality standards, and enablement of internal product teams through documentation and support. 

 Primary Responsibilities: 

• Engineer and evolve a shared design system and component library using TypeScript, including reusable UI components, patterns, and utilities. 

• Translate approved UX/UI designs and interaction specifications into robust, accessible components in partnership with designers and product engineers. 

• Develop and maintain Web Components (custom elements) and related standards-based patterns to support consistent, framework-agnostic adoption across consuming applications. 

• Champion and apply accessibility (a11y) standards for the library (semantic markup, keyboard/focus behavior, appropriate ARIA), and support consuming teams with guidance and reviews. 

• Develop and maintain the library ecosystem, including documentation, usage guidelines, examples, and developer enablement materials. 

• Build and operate Node.js-based tooling for the library (build, test, lint, packaging, and publishing) and support CI/CD automation. 

• Adhere to established quality practices for the design system: automated unit/integration tests, visual/regression testing where applicable, and code review standards. 

• Support versioning and release practices for internal consumers (e.g., semantic versioning, change logs, deprecation strategy) to enable safe adoption. 

• Support internal users of the design system by troubleshooting integration issues, triaging defects, and improving developer experience (DX). 

• Collaborate with product, design, QA, and other engineering teams to understand needs, prioritize backlog, and drive alignment on shared UI standards. 

• Understand and adhere to the Company’s risk and regulatory standards, policies, and controls; escalate risk-related issues as needed. 

• 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. 

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. 

• Professional experience engineering reusable front-end components using JavaScript/TypeScript. 

• Experience with Node.js and front-end build tooling to support packaging, testing, and publishing (e.g., CI pipelines). 

• Experience with code quality practices such as reviews, automated testing, and continuous integration. 

• Advanced proficiency with at least one modern front-end framework (Angular, React, Vue, Solid, Svelte, or Lit). 

Education and Experience Preferred: 

• Deep experience implementing and validating accessible component behavior (a11y) and familiarity with WCAG concepts. 

• Experience with design system tooling (e.g., Storybook or similar) and maintaining high-quality component documentation. 

• Familiarity with Figma design handoffs (e.g., consuming component specs, tokens, and interaction guidance) and collaborating with designers to clarify implementation details. 

• Hands-on experience with Angular, React, and Lit in a component-library or design-system context. 

• Familiarity or hands-on experience with Web Components (custom elements; Shadow DOM concepts) and how to integrate them with common frameworks. 

• Experience publishing and maintaining internal packages (versioning, release notes, deprecation strategy) for multiple consuming teams. 

• Experience with monorepos and modern build tooling (e.g., package managers, bundlers, linters) and improving developer experience (DX). 

• Experience working in an Agile team environment. 

• Ability to work autonomously and to multitask on complex projects. 

• Strong organizational and time management skills. 

• Proficient verbal and written communication skills. 

We support our team members with generous benefits. 

• Competitive compensation 

• Health, welfare, and retirement benefits 

• 401(k) match at 5% 

• Work-life balance and flexible work arrangements 

• Banking Officers start with 25 days PTO plus 12 paid holidays  

• 40 hours paid volunteer hours per year 

• Much more. For details, see: M&T Benefits Overview