Sr Software Engineer II - Full Stack - The Card Shop

Job ID: 26014792Posted: 2026-10-06Location: New York, NY, United StatesJob Function: Engineering & ArchitectureSchedule: Full timeShift: DayWorkplace: HybridCareer Area: TechnologyCompany: American ExpressDescriptionJoining Amex Tech means discovering and shaping your contribution to something big. Here, you can work alongside talented tech teams and build a unique career with the Powerful Backing of American Express. With a range of opportunities to work with the latest technologies, and a commitment to back the broader engineering community through open source, our mission is to power your success. Because Amex Tech is powered by our technology, our culture, and our colleagues.​The Technology organization enables and accelerates the company’s growth strategies, delivering global capabilities and services in support of Amex’s customers and colleagues, while maintaining 24/7 servicing and availability to ensure an uninterrupted, high-quality customer experience. Technology provides the foundation for everything we do in the company while driving differentiation through building and leveraging innovative technology and data insights.​​The U.S. Consumer Services and Membership Digital Experiences Technology team (USCDT) brings together foundational strategic technology capabilities in digital experience engineering (Mobile and Web), marketing and advertising technology, enterprise communications, travel and lifestyle, and dining technology. It employs a ground-breaking focus with development responsibilities for customer-facing capabilities that deepen and expand digital engagement, as well as core technical capabilities that cut across business lines and customer segments.You will be part of the Card Shop group, which focuses on and strives to provide best in class user experiences to our customers when they shop for American Express products. Your work will be at the frontline of American Express' commitment to excellence to our customers, and thus highly visible, impactful, and rewarding.If you love the React ecosystem and want to write modern outstanding JavaScript, We are a full stack React and NodeJS shop. We continuously develop high quality React pages comprised of our own sophisticated crafted React components delivering a modern experiences and innovative product to our customers. Whether your thing is to create pure react components or end to end JavaScript or TypeScript solutions we have things that will interest you. American Express as a corporation are a react shop and the digital acquisition's shop team sit on top of the corporation's technology stack allowing developers to concentrate on wholesome JavaScript goodness knowing that what they do makes a difference.We are looking for a Senior Software Engineer – Web Full Stack with strong expertise in JavaScript, TypeScript, Node.js, React, and modern web technologies to join an agile, cross-functional engineering team that values collaboration, automation, technical excellence, and innovation.In this role, you will design and build highly scalable, performant, resilient, and accessible web applications while helping shape technical direction and engineering best practices. As a senior engineer, you will be expected to take ownership of complex technical initiatives, influence architecture and design decisions, and mentor engineers across the team.You will be part of the Card Shop group, focused on delivering best-in-class digital experiences for customers shopping for American Express products. Your work will directly contribute to critical customer journeys and will be highly visible and impactful.ResponsibilitiesDesign, architect, and deliver complex features and capabilities across the full web application stack.Provide technical leadership and help drive architecture, design decisions, and engineering standards.Build scalable, resilient, secure, accessible, and high-performing applications using modern web technologies.Collaborate closely with Product Owners, engineers, and other partners to translate business needs into well-designed technical solutions.Break down complex technical problems and provide clear implementation approaches for the broader engineering team.Mentor engineers through technical guidance, code reviews, pair programming, and knowledge sharing.Champion engineering best practices across code quality, testing, observability, reliability, and maintainability.Improve deployment confidence through comprehensive automated testing, reliability frameworks, monitoring, and automation.Identify and address performance, accessibility, availability, and scalability opportunities across our applications.Partner with Site Reliability Engineering teams to investigate production issues, perform root-cause analysis, and implement sustainable solutions.Evaluate emerging technologies and frameworks and introduce solutions that meaningfully improve our applications, developer experience, and engineering effectiveness.Continuously identify opportunities to simplify systems, reduce technical debt, and improve team development practices.QualificationsHave 9+ years of professional software engineering experience, with significant experience building modern web applications.Have demonstrated experience architecting and developing complex systems, leading technical direction, and driving solutions from design through production.Have strong hands-on expertise with JavaScript and TypeScript.Have deep experience with modern front-end frameworks and state-management patterns, particularly React and Redux or similar technologies.Have strong experience with Node.js, REST APIs, Express, and server-side JavaScript/TypeScript development.Have experience with automated testing frameworks and practices using technologies such as Jest and Mocha.Understand modern JavaScript development practices, the open-source ecosystem, and contemporary web architecture patterns.Have experience designing applications for scalability, performance, resilience, accessibility, and maintainability.Demonstrate strong technical leadership and the ability to mentor and elevate other engineers.Are comfortable working in an environment based on Agile development methodologies and DevOps principles.Take ownership, proactively identify problems, and collaborate across teams to develop effective solutions.Have a strong customer-first mindset and a passion for building intuitive, reliable digital experiences.Are excited about innovation, automation, and continuous improvement.Employment eligibility to work with American Express in the U.S. is required as the company will not pursue visa sponsorship for these positions.About the TeamAt American Express, our culture is built on a 175-year history of innovation, shared values and Leadership Behaviors, and an unwavering commitment to back our customers, communities, and colleagues. From delivering differentiated products to providing world-class customer service, we operate with a strong risk mindset, ensuring we continue to uphold our brand promise of trust, security, and service.As part of Team Amex, you’ll experience our powerful backing with comprehensive support for your holistic well-being and many opportunities to learn new skills, develop as a leader, and grow your career. Here, your voice and ideas matter, your work makes an impact, and together, you will help us define the future of American Express.