Senior Frontend Software Engineer - Global Commercial Services Technology

Global Commercial Services (GCS) serves millions of business customers around the world, from mom-and-pop shops to Fortune 500 companies. We back businesses so they can do more business, with a mission to be the undisputed leader in financial and membership services - responsibly driving double-digit revenue growth. We do that by offering a diverse range of payment and cashflow tools, from a wide range of traditional card products, to working capital and supply chain financing, to new digital solutions that make it easy for our customers to manage a full range of their financial and payment needs.

The Global Commercial Services team at American Express is seeking a Senior Software Engineer I with strong expertise in frontend development and user-centric product engineering. This role will play a key part in building a next-generation expense management platform that delivers intuitive, scalable, and high-performing digital experiences for Small and Medium-sized (SMS) businesses and Corporate customers.

Qualifications

- 5+ years of experience in software engineering with a strong focus on frontend development.

- Experience collaborating closely with product management and UX design teams.

- Strong design sensibilities and a desire to build pixel perfect UI.

- Strong communication, leadership, and mentoring skills.

- Expert proficiency in React and Typescript.

Strong hands-on experience building modern web applications:

Web: Next.js (App Router, RSC), React 19.

Mobile: React Native (Expo), React 19.

Monorepo : Turborepo

Data & state : TanStack Query (React Query) for server state, Zustand for client state, and tRPC for type-safe client-server contracts.

UI & design system : Tailwind CSS, class-variance-authority, and an internal component library; Framer Motion and react-reanimated for animation.

Observability & analytics : Datadog RUM and APM, Amplitude, FullStory .

Testing : Vitest for unit and integration tests; familiarity with component, visual, and end-to-end testing approaches.

CI/CD: Github Actions

Employment eligibility to work with American Express in the United States is required as the company will not pursue visa sponsorship for this position.