Senior Backend Software Engineer - Global Commercial Services Technology

Global Commercial Services (GCS) serves millions of business customers around the world, from mom-and-pop shops to Fortune 500 companies. We back businesses so they can do more business, with a mission to be the undisputed leader in financial and membership services - responsibly driving double-digit revenue growth. We do that by offering a diverse range of payment and cashflow tools, from a wide range of traditional card products, to working capital and supply chain financing, to new digital solutions that make it easy for our customers to manage a full range of their financial and payment needs. The Global Commercial Services team at American Express is seeking a Senior Software Engineer I with deep expertise in backend engineering, distributed systems, and cloud-native development. This role will be instrumental in building scalable platform services that power a next-generation expense management solution for Small and Medium-sized (SMS) businesses and Corporate customers. Design, develop, and deploy scalable backend services and APIs using Golang in AWS environments. Build microservices leveraging domain-driven design and modern architectural patterns such as hexagonal architecture. Collaborate with frontend engineers, product managers, and stakeholders to define service contracts and platform capabilities. Mentor engineers and foster strong collaboration across distributed engineering teams. Evaluate and integrate SaaS, PaaS, and IaaS solutions to meet functional and non-functional requirements. Participate in architecture reviews, RFCs, and proof-of-concept initiatives. Develop highly scalable, resilient, and observable distributed systems. Design and implement event-driven architectures and streaming solutions using Kafka and related messaging technologies. Integrate with workflow orchestration and durable execution frameworks such as Camunda and Temporal. Design and manage data systems across relational, graph, document, search, and OLAP databases. Build and operate cloud-native systems using AWS services such as Lambda, ECS, SQS, API Gateway, RDS, and S3. Implement observability through logging, monitoring, and distributed tracing using tools such as Datadog. Establish backend engineering standards, best practices, and system design conventions. Plan, estimate, and deliver on engineering work while proactively mitigating risks and resolving blockers. Communicate progress and system capabilities to stakeholders and leadership. 5+ years of experience in software engineering with a strong focus on backend systems. Bachelor’s degree in Computer Science , Software Engineering, Information Technology, or related field. Strong hands-on experience building backend services using Golang. Strong experience designing and deploying systems in AWS cloud environments. Experience building and operating distributed systems, APIs, and microservices architectures. Experience with domain-driven design and modern architectural patterns. Experience working with a variety of data storage technologies including relational and NoSQL databases. Experience with distributed Postgres-compatible databases such as CockroachDB . Experience integrating workflow orchestration platforms such as Camunda or Temporal. Experience implementing observability, monitoring, and performance optimization tools such as Datadog. Experience collaborating across cross-functional teams and mentoring engineers. Strong communication and problem-solving skills . Experience integrating AI/ML models into backend systems is a plus. Entrepreneurial mindset and passion for building scalable systems. Employment eligibility to work with American Express in the United States is required as the company will not pursue visa sponsorship for this position.