Senior Software Engineer I

Senior Software Engineer I

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.

As a Software Engineer in GMST you will be crafting solutions that are scalable and can be delivered iteratively to enhance business value, building core features and functions of card transaction systems on our distributed platform deployed in the cloud. Actively participating in agile teams and the latest development practices, writing code and unit tests, working with API specs and automation. Providing technical leadership to engineers to aid in the development of engineers within the team. GMST Engineers use Java Technologies to drive innovation while also finding opportunities to adopt new technologies.

Are you looking to join a team of Engineers who not only write code and test but also innovate? If so, join our GMST team and work on the Merchant Platform!

Responsibilities

• Mentor junior Software Engineers and cross-functional team of colleagues, fostering a culture of excellence and innovation

• Direct the design, development, testing, and deployment of software applications and systems

• Oversee a variety of tasks, platforms, and technologies to expand new and existing software to meet changing requirements

• Write automated unit tests to ensure correctness and stability

• Provide technical guidance to ensure adherence to best practices and coding standards

• Monitor software performance and implement improvements to optimize functionality

• Analyze technical challenges and provide innovative solutions to enhance software quality and efficiency

• Collaborate with cross-functional teams to ensure seamless integration and deployment of software solutions

• Collaborate and co-create effectively with teams in product and the business to align technology initiatives with business objectives

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, and/or comparable experience; advanced degree preferred.

• Knowledge of distributed (multi-tiered) systems, algorithms, NoSQL, and relational databases

• Knowledge of the core tools used in the planning, analyzing, crafting, building, testing, configuring, and maintaining of assigned application(s)Degree in computer science, computer engineering or a related field.

• Significant hands-on experience in application architecture / design, software development, and testing, preferably in an Agile environment within a professional environment.

• Minimum 10 years of proven experience using Java, React, Vert.x, Spring, Spark, Postgres, Restful APIs, Redis, Kafka and cloud-native application development.

• Experience designing, and building AI-powered and Agentic AI solutions, including LLM-based applications, AI agents, retrieval-augmented generation (RAG), prompt engineering, orchestration frameworks, vector databases, and AI service integrations.

• Strong engineering and professional leadership skills.

• Demonstrated ability to lead, partner, and collaborate multi-functionally across many engineering teams.

• Experience in Agile software development methodologies and practices such as Scrum/Kanban, iterations, user stories

• Experience in automation testing and documentation (i.e. automated, functional, and performance)

• Employment eligibility to work with American Express in the United States is required as the company will not pursue visa sponsorship for these 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.

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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 26010003

• Job Category Technology

• Posting Date 07/09/2026, 06:32 PM

• Apply Before 07/17/2026, 05:00 AM

• Degree Level Bachelor's Degree

• Job Schedule Full time

• Job Shift Day

• Locations AMEX 18850 N 56th Street, Phoenix, AZ, 85054, US(Hybrid)

• Salary Range $123000 - $215250 annually + bonus + benefits

• Career Area Technology

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