Lead AI Agent Engineer & Manager

EY; Stamford (CT); Remote; USD 126,000 - 251,000; Full time

Job summary

EY is seeking a Senior AI Engineer to build long- running agents and production-grade workflows that operate across complex enterprise integrations. You will design execution loops, contexts, and controls to ensure deterministic behavior while allowing safe autonomy where it adds value.

This role sits at the intersection of applied AI, distributed systems, and product engineering, requiring strong software discipline, operational visibility, and the ability to ship reliable, risk-aware AI

Qualifications

• Bachelor’s Degree in a relevant field of study.
• 7-9 years of experience in software or applied machine-learning engineering, with ownership of production systems and their live behavior.
• Hands-on evidence of shipping large-language-model applications, agents, or complex model-driven workflows used for real work.
• Strong capability in Python, TypeScript, or another language used for production services and integrations.
• Experience with model APIs, structured outputs, retrieval, tool use, and evaluation of variable behavior.
• This role requires up to 50% travel and hybrid on-site work.

Responsibilities

• Choose the right execution model. Design agent architectures that use deterministic steps, a single-agent loop, or coordinated agents only when measured performance justifies the complexity.
• Build dependable tools. Create connectors and interfaces with clear contracts, validated outcomes, narrow authorization, and errors that help the agent recover or elevate.
• Engineer agent behavior. Shape planning, routing, delegation, stopping, retry, and handoff behavior across complete workflows.
• Create durable context. Combine instructions, user state, retrieval, memory, and environment feedback while preserving relevance, provenance, freshness, and permitted access.
• Bound agent authority. Implement scoped identities, credentials, budgets, approval points, and emergency containment so agents act within explicit limits.
• Evaluate complete trajectories. Build representative tests that measure verified task success, tool use, recovery, human takeover, and prohibited actions rather than isolated responses.
• Operate long-running execution. Use durable state, checkpointing, safe retries, versioned releases, rollback, and graceful degradation to keep work recoverable.
• Make behavior observable. Instrument end-to-end traces and replay so teams can understand failures, diagnose patterns, and turn production evidence into improvements.
• Protect user control. Design clear intervention points so people can inspect, interrupt, redirect, and safely resume agent work.
• Build shared capability. Partner across product, platform, knowledge, security, and evaluation teams and publish reusable agent patterns and operational lessons.

Skills

Production engineering

Agent architecture

AI application depth

Evaluation discipline

Security and operability

Product judgment

Travel and on-site flexibility

Education

Bachelor’s Degree

Tools

Python

TypeScript

Job description

EY is seeking a Senior AI Engineer to build long- running agents and production-grade workflows that operate across complex enterprise integrations. You will design execution loops, contexts, and controls to ensure deterministic behavior while allowing safe autonomy where it adds value.

This role sits at the intersection of applied AI, distributed systems, and product engineering, requiring strong software discipline, operational visibility, and the ability to ship reliable, risk-aware AI