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Sr AI Engineer II - Agentic AI

American Express
Phoenix, USA
Full-time
Mid-Senior
Onsite
Discovered 1 months ago
Agentic AILarge language modelsRetrieval-augmented generationAI agent orchestrationLLM evaluation and monitoringBackend systems

Full Job Posting

Role Overview

Build production-grade agentic systems that operate on financial data, serve customers, and meet regulatory requirements.

Work end to end from solution shaping with product and design through production delivery and post-launch ownership.

Develop customer-facing LLM features, agentic financial workflows, and internal AI capabilities for engineering teams.

This is an engineering delivery role rather than a research-only position.

Technology Organization

American Express Technology delivers global capabilities and services while supporting continuous servicing and availability.

The Global Web Engineering team builds scalable, customer-facing digital web products used by American Express customers worldwide.

The US Consumer Services and Membership Digital Experiences Technology team develops digital, marketing, travel, dining, and communications capabilities.

Responsibilities

  • Design, build, and ship LLM-powered and agentic product features that change how customers manage their finances.
  • Build agentic systems that reason over context, invoke tools, take actions, and recover gracefully from failure.
  • Implement production-grade RAG pipelines over sensitive financial data with correctness, auditability, and safety controls.
  • Contribute to shared LLM services, agent orchestration frameworks, and evaluation and monitoring tooling.
  • Own production reliability, latency, cost, and failure modes for delivered systems.
  • Work with product and design partners and focus on customer outcomes.

Technical Environment

  • Core languages include Python, Go, and TypeScript.
  • Cloud and infrastructure technologies include AWS or GCP and Kubernetes.
  • Services use REST and gRPC APIs and event-driven architectures such as Kafka.
  • The AI environment includes commercial and open-source LLMs, retrieval, vector storage, evaluation, schema validation, and state management.
  • AI-assisted development workflows support design, implementation, testing, debugging, and refactoring.
  • Systems must meet high standards for reliability, security, and auditability in financial services.

Qualifications

  • At least 8 years of software engineering experience, including meaningful production experience with LLMs or applied ML systems.
  • Track record of shipping AI-powered or agentic systems that real users depend on.
  • Strong 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 ownership, sound technical judgment, comfort with ambiguity, product mindset, and customer orientation.

Preferred Qualifications

  • Experience building agentic systems in fintech or another regulated industry is preferred.
  • Founding engineer or early technical contributor experience in high-growth environments is preferred.
  • Meaningful open-source contributions in AI or developer tooling are preferred.
  • Experience with React, Kotlin, TypeScript, CircleCI, iOS or Swift, and Android is preferred.

Benefits and Work Model

  • Benefits include competitive base salaries, bonus incentives, retirement savings matching, financial coaching, and comprehensive insurance.
  • The company offers parental leave, wellness centers in some locations, counseling support, career development, and training.
  • Work arrangements may be onsite, hybrid, or fully virtual depending on the role and business need.

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