AI Phone - Senior Agent Runtime Engineer

Overview

Build the execution infrastructure for AI agents on an AI phone platform that aims to make everyday apps proactive and intelligent with minimal prompting.

What you'll do

• Implement agent runtime and orchestration components.
• Build tool-calling and execution interfaces.
• Support multi-step and long-running task execution.
• Manage task state, execution history and asynchronous workflows.
• Implement error handling, retries and recovery mechanisms.
• Integrate multiple model providers.
• Build observability and tracing for agent execution.
• Optimize latency, reliability and inference costs.
• Work with context and memory components to provide relevant information to agents.

What you'll need

• Strong backend engineering experience.
• Experience with distributed systems and asynchronous workflows.
• Experience integrating LLMs into production applications.
• Strong API and service architecture knowledge.
• Experience with queues, state management and observability.
• Good understanding of tool calling and structured outputs.

Nice to have

• Production agent framework or custom agent runtime experience.
• Experience with Temporal or similar workflow orchestration systems.
• Experience with model routing and inference optimization.
• Experience with AI evaluation and tracing.