Senior Frontend Software Engineer - Global Commercial Services Technology

Global Commercial Services (GCS) serves millions of business customers worldwide. The team is seeking a Senior Software Engineer I with strong frontend expertise to build a next-generation expense management platform delivering intuitive, scalable digital experiences for small and medium businesses and corporate customers.

• Lead the design, development, and deployment of modern web applications using React and TypeScript.
• Collaborate closely with product managers, designers, and stakeholders to shape product requirements and user experiences.
• Build scalable, responsive, and accessible frontend architectures and component libraries.
• Develop data-driven UI experiences, dashboards, and dynamic forms using JSON-schema or similar approaches.
• Partner with backend engineers to integrate APIs and deliver seamless end-to-end functionality.
• Mentor engineers and contribute to a strong culture of collaboration across teams and engineering guilds.
• Integrate analytics, instrumentation, and observability into frontend applications.
• Optimize performance, scalability, and reliability across browsers and devices.
• Participate in architecture discussions, RFCs, and proof-of-concept initiatives.
• Establish and maintain coding standards, testing practices, and design conventions.
• Plan, estimate, and execute on deliverables while proactively identifying risks and resolving blockers.
• Communicate progress and demonstrate milestones to stakeholders, incorporating feedback into iterative improvements.

• 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.

• Competitive base salaries
• Bonus incentives
• 6% Company Match on retirement savings plan
• Free financial coaching and financial well-being support
• Comprehensive medical, dental, vision, life insurance, and disability benefits
• Flexible working model with hybrid, onsite or virtual arrangements depending on role and business need
• 20+ weeks paid parental leave for all parents, regardless of gender, offered for pregnancy, adoption or surrogacy
• Free access to global on-site wellness centers staffed with nurses and doctors (depending on location)
• Free and confidential counseling support through our Healthy Minds program
• Career development and training opportunities