Senior AI Engineer II - Agentic AI

The Enterprise Technology Services organization partners with all areas of American Express to drive growth and innovation while maintaining trust, efficiency, and security. This role focuses on building and shipping agentic AI systems that operate responsibly at scale within a regulated financial environment.

Technical Environment

Development occurs in a modern, enterprise‑scale environment with a strong emphasis on agentic AI. The stack includes Python, Go, TypeScript, AWS and/or GCP, Kubernetes, REST, gRPC, event‑driven architectures, and Kafka.

Core Engineering Stack

• Languages: Python, Go, TypeScript
• Cloud and infrastructure: AWS and/or GCP, Kubernetes
• APIs and services: REST, gRPC
• Distributed systems: event‑driven architectures, including Kafka

Agentic AI and ML

• Commercial and open‑source LLMs integrated into agentic workflows
• Tooling for agent orchestration, retrieval‑augmented generation, vector storage, and evaluation
• Strong schema, validation, and state management practices

AI‑Assisted Development

• Fluency with AI‑assisted and agentic development workflows for design, implementation, testing, debugging, and refactoring
• Thoughtful use of these tools while maintaining production‑quality engineering standards
• All systems are built to meet high standards for reliability, security, and auditability, reflecting the responsibility of deploying autonomous AI in a financial services environment

Responsibilities

• Design, build, and ship LLM‑powered and agentic product features that change how customers manage their finances
• Build agentic AI systems that reason over context, invoke tools, take real actions, and recover gracefully from failure
• Architect and implement production‑grade RAG pipelines over sensitive financial data, with strict requirements for correctness, auditability, and safety
• Contribute to shared AI infrastructure, including LLM services, agent orchestration frameworks, and evaluation and monitoring tooling that scales agentic development across Amex Technology
• Own the systems you build in production, including reliability, latency, cost, and failure modes
• Work closely with product and design partners; focus on customer outcomes as well as technical execution

Minimum Qualifications

• Proven software engineering experience, including meaningful production experience with LLMs or applied ML systems
• A track record of shipping AI‑powered or agentic systems that real users depend on
• Strong engineering fundamentals across backend systems, APIs, data pipelines, and cloud infrastructure
• Hands‑on experience with modern LLM tooling and agentic patterns and architectures
• Fluency with AI‑assisted and agentic development workflows
• Strong sense of ownership and sound technical judgment
• Comfort operating with ambiguity and turning it into shipped reliable product
• A strong product mindset and customer orientation

Preferred Qualifications

• Experience building agentic systems in fintech or other regulated industries
• Experience as a founding engineer or early technical contributor in high‑growth environments
• Demonstrated ability to ship technically complex systems in regulated contexts that customers actively rely on
• Meaningful open‑source contributions, particularly in AI or developer tooling

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

Benefits

• Competitive base salaries
• Bonus incentives
• Support for financial‑well‑being and retirement
• Comprehensive medical, dental, vision, life insurance, and disability benefits (depending on location)
• Flexible working model with hybrid, onsite or virtual arrangements depending on role and business need
• Generous paid parental leave policies (depending on your location)
• 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

Offer of employment with American Express is conditioned upon the successful completion of a background verification check, subject to applicable laws and regulations.