Sr Software Engineer I - JavaScript - The Card Shop

Joining 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.

Join Card Shop and help shape the digital experiences customers use to shop for American Express products. As a Senior Software Engineer and hands-on tech lead, you will guide the architecture and delivery of high-impact web capabilities built with JavaScript, TypeScript, React, Node.js, and modern web technologies. The team uses experimentation and a test-and-learn mindset to improve customer engagement and product acquisition.

You will combine deep full-stack engineering with team-level technical leadership: owning complex initiatives, making sound architecture decisions, and helping engineers do their best work. You will also help the team make thoughtful use of modern AI coding agents to improve how we design, build, test, and operate software, while holding the bar for customer experience, security, and quality.

You will work in an agile, cross-functional group where collaboration, automation, technical excellence, and continuous learning matter. Your work will contribute directly to important customer journeys.

Technical Leadership and Decision Scope

• Own team-level technical decisions, including architecture, engineering standards, and implementation trade-offs within agreed team boundaries.
• Set shared technical direction across projects. Project Leads coordinate project delivery and make project-specific decisions consistent with team standards; decisions with broader architectural or cross-team impact are aligned with this role and relevant partners.
• Partner with the engineering manager, who retains people-management and team-priority decisions. Escalate decisions that exceed the team's technical scope or introduce significant cross-team or customer risk.
• Balance implementation work with architecture, technical guidance, and mentoring; this is a hands-on engineering role, not a full-time coordination role.

What You'll Do
Technical Direction and Delivery

• Design, architect, and deliver complex features across the full web application stack.
• Translate business needs into technical solutions with Product Owners, engineers, and other partners; break complex problems into clear implementation approaches and communicate trade-offs and risks.
• Guide architecture and design decisions, document significant decisions and rationale, and keep project solutions aligned with team standards.

Experimentation and Customer Outcomes

• Partner with Product Owners and analytics and design partners to turn customer and business opportunities into testable hypotheses.
• Build the application capabilities needed to run experiments, such as reliable analytics instrumentation, feature flags, and controlled rollouts.
• Ensure experiments are measurable and meet standards for performance, accessibility, privacy, and reliability; use results to guide iteration, rollout, or rollback decisions.
• Apply test-and-learn findings to improve engagement and acquisition across customer journeys.

Engineering Quality and Production Health

• Build and evolve secure, scalable, resilient, accessible, and high-performing applications.
• Improve code quality, automated testing, observability, reliability, and maintainability to increase confidence in delivery.
• Identify and address performance, accessibility, availability, and scalability issues; partner with Site Reliability Engineering on production investigations, root-cause analysis, and lasting fixes.

Team Leadership and Improvement

• Mentor engineers through technical guidance, code reviews, pair programming, and knowledge sharing.
• Simplify systems, reduce technical debt, and improve team development practices.
• Evaluate technologies and frameworks, adopting them when there is a clear benefit to customers, applications, or engineering effectiveness.

AI-Native Engineering

• Lead practical adoption of modern AI coding agents across engineering workflows, including implementation, test creation, refactoring, documentation, and operational support.
• Help the team build repeatable ways to work with agents, including clear task context, appropriate human review, and validation through tests and other quality checks.
• Use only approved tools and protect customer, company, and proprietary information; ensure generated changes meet security, privacy, licensing, accessibility, and engineering standards.
• Evaluate whether agent-assisted workflows improve delivery, quality, or developer experience, and share effective practices across the team.

What Success Looks Like

• Team-level technical decisions and standards are clear, documented where useful, and applied consistently across projects.
• Customer journeys meet agreed expectations for quality, security, accessibility, performance, and reliability, with risks surfaced early.
• Experiments produce trustworthy insights that inform product decisions and improvements to customer engagement and acquisition.
• Production issues lead to root-cause understanding and sustainable improvements, not only short-term fixes.
• Engineers are better equipped to make sound technical decisions, and delivery is more predictable through effective collaboration and automation.
• AI coding agents are used through repeatable, responsible workflows that improve engineering effectiveness without compromising quality, security, or customer trust.

• 9+ years of professional software engineering experience, including substantial hands-on experience building modern web applications.
• Demonstrated experience architecting and delivering complex production systems, setting technical direction, and carrying solutions from design through production.
• Strong hands-on expertise in JavaScript and TypeScript, with deep experience in React and Redux or a comparable state-management technology.
• Strong experience with Node.js, REST APIs, Express, and server-side JavaScript or TypeScript development.
• Practical experience with automated testing frameworks such as Jest and Mocha, and with modern JavaScript development practices and web architecture patterns.
• Experience designing and operating applications for scalability, performance, resilience, accessibility, security, and maintainability.
• Demonstrated technical leadership, including mentoring engineers, guiding design decisions, and helping teams reach sound technical outcomes.
• Experience working with Agile development methodologies and DevOps principles, including automated delivery, monitoring, and production support.
• Strong ownership, communication, and collaboration skills, with the ability to work across teams and explain technical decisions and trade-offs.
• A customer-first mindset and a track record of improving digital experiences through engineering quality, automation, and continuous improvement.
• Willingness to experiment with modern AI coding assistants or agents and the judgment to critically review and validate their output.

Employment eligibility to work with American Express in the U.S. is required as the company will not pursue visa sponsorship for these positions.