American Express
Senior AI Engineer - Enterprise Architecture
Phoenix, AZ +1 · Senior · Full-time · Posted Sep 28, 2026
- Location
- Phoenix, AZ
Sunrise, FL - Experience
- 5+ years of software engineering experience, including meaningful production experience with LLMs or applied ML systems.
- Visa sponsorship
- American Express may provide visa sponsorship for certain positions, depending on business unit requirements, the nature of the position, cost, and applicable laws.
About the job
Builds and operates production-grade LLM-powered features and agentic systems for financial workflows and customer experiences, with a focus on reliability, safety, and auditability.
What you'll do
- Design and ship customer-facing LLM features and agentic systems that can reason, use tools, and take actions.
- Build RAG pipelines and shared AI infrastructure, including orchestration, evaluation, and monitoring tools.
- Own production systems and work with product and design teams to deliver customer outcomes.
What they ask for
- 5+ years of software engineering experience, including meaningful production experience with LLMs or applied ML systems.
- Track record of shipping AI-powered or agentic systems relied on by real users.
- Strong engineering fundamentals across backend systems, APIs, data pipelines, and cloud infrastructure.
- Hands-on experience with modern LLM tooling and agentic patterns, and fluency with AI-assisted and agentic development workflows.
Nice to have
- Experience building agentic systems in fintech or other regulated industries.
- Experience as a founding engineer or early technical contributor in high-growth environments; meaningful open-source contributions, particularly in AI or developer tooling.
Pay
$123000 - $215250 annually (base salary)
Tools
Python, Go, TypeScript, AWS, GCP, Kubernetes, REST, gRPC
AI focus
Develops and deploys agentic AI and LLM-powered products, RAG pipelines, orchestration infrastructure, and AI evaluation and monitoring tools.
Model-written summary · the original posting is authoritative