Senior Software Engineer - Enterprise Design System

Overview: 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 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. 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. View M&T’s Human Capital Report to learn more. Ready to join our team? Submit your application today! If you are unable to apply through this site due to technical issues or need an accommodation to apply, please contact us at View email address on click.appcast.io for assistance. 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. Career Site Privacy Notice