Sr Software Engineer I - Java - One Data Platform

Job Description American Express is seeking a highly skilled and experienced Senior Software Engineer to join the One Data platform team within Enterprise Architecture. This role is a key part of the organization’s technology strategy and supports the design, development, and delivery of scalable platform capabilities that enable engineering teams across the enterprise to build and deploy microservices at scale. Enterprise Architecture plays a critical role in shaping the company’s technology direction through four core pillars: Architecture as Code, Architecture as Design, Governance, and Colleague Enablement. The One Data platform team is focused on building foundational technologies that empower teams across American Express to deliver modern, resilient, and high-performing software solutions. Responsibilities Design, develop, and deliver scalable, high-quality software solutions across the full stack using Java and Python for enterprise-grade platform services and applications. Lead the architecture and implementation of distributed systems with a strong emphasis on performance, reliability, maintainability, and operational excellence. Own end-to-end delivery of features, from design and implementation to deployment, monitoring, and production support. Act as a senior technical contributor in an Agile environment, guiding best practices in software engineering, testing, documentation, and continuous delivery. Mentor junior engineers through code reviews, design discussions, and knowledge-sharing activities. Collaborate closely with architects, product managers, and cross-functional stakeholders to translate business requirements into scalable technical solutions. Build and evolve RESTful APIs, microservices, and event-driven systems with strong service contracts and backward compatibility. Improve CI/CD pipelines, automate testing, and enhance developer productivity through modern engineering practices. Identify bottlenecks, debug complex production issues, and perform root-cause analysis to drive long-term fixes. Design systems with a focus on scalability, resilience, observability, monitoring, logging, and alerting. Contribute to cloud-native transformation initiatives, including containerization, infrastructure as code, and auto-scaling architectures. Influence technical direction by challenging assumptions and proposing innovative, pragmatic solutions. Take accountability for delivering high-impact outcomes aligned with team and organizational goals. Qualifications Basic understanding of AI/ML concepts and Generative AI technologies, including LLMs, prompt engineering, and Retrieval-Augmented Generation (RAG). Strong Linux and Unix shell proficiency, including shell scripting and troubleshooting. Experience with NGINX, HAProxy, Envoy, Docker, Kubernetes, Terraform, or similar technologies. Strong source control skills using Git. Experience with observability and monitoring platforms such as Splunk, Elastic, Datadog, Prometheus, or Grafana. Good understanding of JVM internals and the ability to diagnose issues using thread dumps, heap dumps, JFR, VisualVM, or similar tools. A proactive and collaborative mindset with a strong desire to document technical knowledge and improve team productivity. Core Competencies Systems thinking and the ability to reason about edge cases, failure modes, and operational behavior. Strong communication and collaboration skills, including asynchronous communication and cross-functional coordination. Enthusiastic, ownership-driven approach to problem solving and continuous improvement. Ability to deliver quickly, iterate rapidly, and adapt to changing priorities in a dynamic environment. About Us 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. About The Team 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 salariesBonus incentives6% Company Match on retirement savings planFree financial coaching and financial well-being supportComprehensive medical, dental, vision, life insurance, and disability benefitsFlexible working model with hybrid, onsite or virtual arrangements depending on role and business need20+ weeks paid parental leave for all parents, regardless of gender, offered for pregnancy, adoption or surrogacyFree access to global on-site wellness centers staffed with nurses and doctors (depending on location)Free and confidential counseling support through our Healthy Minds programCareer 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: https://www.eeoc.gov/poster. 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.