Sr Software Engineer II

At Amex Offers, we are solving complex problems at scale while delivering seamless, high-impact customer experiences. As a Senior Engineer, you will play a key role in evolving our platform and driving end-to-end solutions that power our Offers ecosystem.

The ideal candidate is comfortable working across the full stack from backend systems and data layers to frontend experiences—and has experience building consumer or B2B products. You are able to move quickly while maintaining strong architectural rigor and collaborating effectively across teams.

In this role, you will partner closely with the Enterprise Architecture team to align on scalable, future-ready designs. You will lead end-to-end solution design and execution, working across multiple downstream systems and dependencies to ensure seamless integration and delivery.

You thrive in a fast-paced, evolving environment, are a strong collaborator and problem-solver, and are excited about leveraging technology to drive impactful customer experiences.

Responsibilities

• Design, develop, test, deploy, and maintain modern frontend applications with a focus on performance, scalability, accessibility, and reliability.

• Build intuitive, responsive, and high-quality user interfaces using React, Angular, and modern mobile frameworks Devin AI, git hub copilot, android, IOS experience, React-native API and microservices.

• Develop reusable, modular UI components and ensure consistency across applications and platforms.

• Collaborate with UX/design teams to translate wireframes, prototypes, and design systems into high-quality production code.

• Integrate frontend applications with backend microservices and APIs, ensuring efficient data handling and seamless user experiences.

• Contribute to frontend architecture decisions including state management, component design, and micro-frontend strategies.

• Optimize applications for maximum speed, performance, and cross-browser/device compatibility.

• Write clean, maintainable, and well-tested code adhering to frontend best practices and coding standards.

• Implement and enhance automated testing strategies (unit, integration, and end-to-end testing).

• Conduct code reviews to ensure quality, accessibility (WCAG), performance, and maintainability.

• Monitor and improve frontend performance using observability tools, analytics, and real-user metrics.

• Leverage AI-powered development tools (e.g., Devin AI, Cursor, Claude Code, GitHub Copilot) to improve productivity, accelerate development, and enhance code quality.

• Provide mentorship to junior engineers and contribute to knowledge sharing across teams.

• Participate in Agile development practices such as sprint planning, stand-ups, demos, and retrospectives.

Qualifications

• Bachelor’s degree in computer science, Computer Engineering, or equivalent practical experience.

• Strong understanding of modern frontend architecture and design patterns.

• Deep knowledge of HTML, CSS, JavaScript/TypeScript, and browser rendering behavior.

• Proficiency in React, Angular, and/or modern mobile frameworks.

• Understanding of microservices architecture and frontend-backend integration patterns.

• Knowledge of responsive design, cross-platform development, and accessibility standards (WCAG).

• Familiarity with CI/CD pipelines, performance monitoring tools, and DevOps practices.

• Understanding of state management libraries (Redux, NgRx, Context API, etc.).

• Proven experience in frontend software engineering, building customer-facing web and/or mobile applications.

• Hands-on experience with React, Angular, and mobile technologies (React Native, Flutter, or similar).

• Experience integrating frontend applications with RESTful APIs and microservices-based architectures.