Senior Frontend Engineer

Senior Frontend Engineer Phoenix, AZ, United States(Hybrid) Job Description 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 Cyber Engineering team at American Express is seeking a dynamic engineer for the role of Frontend engineer within the Information Security organization. This position offers a unique opportunity to develop advanced UI/UX capabilities involving emerging technologies, including Generative AI, to stay ahead of the evolving cyber threat landscape and protect American Express's digital assets. Responsibilities Design and build scalable, secure, accessible, and high-performance user interfaces across traditional and AI-powered applications. Own the end-to-end development of modern UI experiences , from architecture and implementation through testing, deployment, and continuous improvement. Build AI-driven and agentic experiences , including conversational, copilot-style, intent-driven, streaming, and human-in-the-loop interactions. Partner with product, design, AI/ML, backend, and platform teams to translate business and user needs into intuitive, cohesive digital experiences. Develop and evolve reusable UI components, design systems, and modular frontend architectures that accelerate development and ensure consistency across applications. Rapidly prototype, experiment, and iterate on new capabilities and interaction patterns, translating successful concepts into production-ready solutions. Continuously learn and adapt to rapidly evolving technologies, frameworks, AI capabilities, and UI paradigms. Champion engineering excellence through clean, maintainable, well-tested code, code reviews, performance optimization, accessibility, security, and continuous refactoring. Apply strong product and UX judgment , leveraging user research, prototypes, experimentation, analytics, and feedback to continuously improve user experiences. Drive performance, reliability, and quality through appropriate testing, observability, telemetry, and measurement of both traditional and AI-powered experiences. Drive innovation and technical direction by evaluating emerging technologies, challenging existing approaches, and influencing frontend engineering standards and best practices. Demonstrate strong ownership and autonomy , navigating ambiguity, prioritizing effectively, communicating trade-offs, and driving complex initiatives from concept through production. Qualifications Associates or BS degree in Computer Science, Information Systems, or other related field (or equivalent 5+ years of work experience) 8+ years of experience with strong focus on frontend or full-stack technology. Strong proficiency in HTML, CSS, JavaScript, TypeScript, and React, NextJS with experience building accessible, responsive, high-performance web applications. Experience with modern frontend styling approaches and frameworks, such as Tailwind CSS, Sass, Less , CSS Modules, or similar technologies. Experience designing and building reusable UI components, design systems, and composable frontend platforms that can scale across products and teams. Deep expertise in modern frontend architecture and engineering, including state management, asynchronous and reactive UI patterns, performance optimization, rendering strategies, and micro-frontend or modular/composable UI architectures. Hands-on experience building GenAI and/or agentic applications, particularly user-facing experiences powered by large language models (LLMs), AI agents, or multi-step AI workflows. Experience designing and implementing AI-driven interaction patterns, including conversational interfaces, copilot-style assistance, command- or intent-driven interactions, and dynamically generated or adaptive user experiences. Strong understanding of prompt engineering, context management, conversation/session state, tool invocation, and streaming response UX, including techniques for handling latency, partial responses, errors, and interruptions gracefully. Experience building real-time and streaming user experiences, including incremental rendering, asynchronous state updates, optimistic UI, and event-driven interactions. Understanding of human-in-the-loop interaction patterns, feedback mechanisms, user control, AI transparency, and explainability principles for trustworthy AI-powered experiences. Experience defining and instrumenting AI/agentic UX metrics, such as time-to-first-response, end-to-end latency, task completion rate, response quality, user engagement, error/recovery rates, and user trust signals. Ability to design user experiences that effectively communicate agent state and activity, including planning, progress, tool execution, confirmations, errors, and completion states. Experience implementing appropriate guardrails and user controls for AI-powered experiences, including confirmation patterns, permission boundaries, failure recovery, and graceful degradation. Experience with automated testing frameworks and practices, including unit, integration, component, and end-to-end testing using tools such as Jest, Vitest, Cypress, Playwright, or similar. Experience with modern frontend build systems, package management, and developer tooling such as Vite, Webpack, npm/pnpm/yarn, or equivalent technologies. Familiarity with modern product and UI design tools such as Figma, with the ability to collaborate effectively with product designers and translate design systems and prototypes into production-quality experiences. Proficiency with AI-assisted software development tools such as GitHub Copilot, Claude Code, Cursor, Gemini Code Assist, or similar coding agents, with the ability to effectively review and validate AI-generated code for correctness, security, performance, accessibility, and maintainability. Hands-on experience with Git, CI/CD pipelines, secrets management, and modern software delivery practices, using technologies such as Jenkins, GitHub Actions, or equivalent tools. Familiarity with containerization and cloud-native technologies, including Docker and Kubernetes, is a plus. Experience with browser extension development and/or mobile application development is a plus. A portfolio, GitHub profile, or examples of previous work demonstrating experience designing and developing sophisticated user-facing applications is preferred. Demonstrated ability to operate effectively in an Agile, cross-functional environment, navigate ambiguity, and adapt to evolving technologies, requirements, and priorities. Excellent communication, collaboration, and technical leadership skills, with the ability to influence architecture and engineering practices and partner effectively with product, design, AI/ML, platform, and engineering teams. Depending on factors such as business unit requirements, the nature of the position, cost and applicable laws, American Express may provide visa sponsorship for certain positions. At 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. We back you with benefits that support your holistic well-being so you can be and deliver your best. This means caring for you and your loved ones' physical, financial, and mental health, as well as providing the flexibility you need to thrive personally and professionally: 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 For a full list of Team Amex benefits, visit our Colleague Benefits Site ( . American Express is an equal opportunity employer and makes employment decisions without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran status, disability status, age, or any other status protected by law. American Express will consider for employment all qualified applicants, including those with arrest or conviction records, in accordance with the requirements of applicable state and local laws, including the California Fair Chance Act, the Los Angeles County Fair Chance Ordinance for Employers, and the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance. For positions covered by federal and/or state banking regulations, American Express will comply with such regulations as it relates to the consideration of applicants with criminal convictions. We back our colleagues with the support they need to thrive, professionally and personally. That's why we have Amex Flex, our enterprise working model that provides greater flexibility to colleagues while ensuring we preserve the important aspects of our unique in-person culture. Depending on role and business needs, colleagues will either work onsite, in a hybrid model (combination of in-office and virtual days) or fully virtually. US Job Seekers - Click to view the "Know Your Rights ( " poster. If the link does not work, you may access the poster by copying and pasting the following URL in a new browser window: The below represents the expected salary range for this job requisition. Ultimately, in determining your pay, we'll consider your location, experience, and other job-related factors.? Job Info Job Identification 26013169 Job Category Technology Posting Date 09/08/2026, 08:04 PM Apply Before 09/23/2026, 04:00 AM Degree Level Bachelor's Degree Job Schedule Full time Job Shift Day Locations AMEX 18850 North 56th Street, Phoenix, AZ, 85054, US(Hybrid) Salary Range $123000 - $215250 annually + bonus + benefits Career Area Technology Return to Jobs List ( American Express