Senior Software Engineer I

The Enterprise Technology Services organization partners with every part of the American Express business to power the company’s growth and innovation with trust and efficiency, and drive competitive differentiation with speed. We support the delivery and operations of technology, digital, and data capabilities, platforms, and services globally. Specifically, our team is responsible for the company’s technology engineering, architecture, and infrastructure, providing 24x7 support to ensure an uninterrupted, high-quality experience for customers and colleagues. We also provide product management for core enterprise platforms, and lead technology risk and information security, enterprise data governance and platforms, digital product and design, and enterprise AI platforms on behalf of the company.

As a Senior Software Engineer in Global Merchant Services Technology (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!

• 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

• 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)