Sr AI Engineer II - Enterprise Architecture

American Express Technology is seeking a Senior AI Engineer II to help build production-grade agentic AI systems that work with real financial data and support real customers. This role emphasizes end-to-end ownership, from shaping solutions with partners to delivering reliable capabilities in a regulated environment.

Responsibilities

• Convert complex and ambiguous problem spaces into production-grade agentic systems that operate on real financial data, support real customers, and satisfy regulatory requirements.
• Own delivery end to end, partnering with product and design to shape solutions, building and shipping production code, and maintaining accountability for what is released.
• Build customer-facing LLM-powered features, agentic systems that automate financial workflows, and internal AI capabilities that help other engineers adopt AI safely and efficiently.
• Work autonomously with sound judgment, pushing the technical envelope while operating within the constraints of a regulated financial setting.

Requirements

• 5+ years of software engineering experience, including meaningful production experience with LLMs or applied ML systems.
• Demonstrated history of shipping AI-powered or agentic systems that real users rely 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 outcomes.
• Product mindset with a customer orientation.

Preferred Qualifications

• Experience building agentic systems in fintech or other regulated industries.
• Experience as a founding engineer or early technical contributor in a high-growth environment.
• Proven ability to ship technically complex systems in regulated contexts that customers actively depend on.
• Meaningful open-source contributions, particularly in AI or developer tooling.
• Depending on business unit requirements, position nature, cost, and applicable laws, American Express may provide visa sponsorship for certain positions.

Role Details

• Location: Phoenix, AZ (onsite)
• Experience: 5+ years
• Compensation: USD 123,000 - 215,250 per year