Principal AI: Autonomous Agent Fleet Architect

STN, Inc.; Oregon; Hybrid; USD 180,000 - 260,000; Full time

Job summary

Horizon AI seeks a Principal to Distinguished level engineering leader to advance autonomous data-center management through agent-based systems. You’ll oversee dozens of agents that diagnose fleet issues, decide actions, and explain why, while shaping the governance to gate decisions before action.

You will define evaluation criteria, own the orchestration framework, and drive reliable, evidence-based decisions that scale across production fleets.

Qualifications

• Built and shipped LLM-based agentic systems in production.
• Strong opinions about evaluation and governance.
• Experience with tool and function calling at scale and online evaluation.

Responsibilities

• Build the evaluation harness for agent behaviour and governance.
• Define the autonomy SLO with the Chief Architect and present evidence for decisions.
• Own the agent architecture: orchestration, tool dispatch, task decomposition, escalation.
• Improve how agents explain their reasoning to ensure action.
• Continue encoding operational runbooks into agent-executable reasoning.

Skills

LLM-based agents

Python distributed systems

Multi-agent orchestration

Tool calling at scale

Evaluation framework

Tools

Tool integration

LLM tracing

Job description

Horizon AI seeks a Principal to Distinguished level engineering leader to advance autonomous data-center management through agent-based systems. You’ll oversee dozens of agents that diagnose fleet issues, decide actions, and explain why, while shaping the governance to gate decisions before action.

You will define evaluation criteria, own the orchestration framework, and drive reliable, evidence-based decisions that scale across production fleets.