Agent Platform Engineer — AI SDK & Systems

Sierra; California (MO); On-site; USD 150,000 - 190,000; Full time

Benefits offered by this job

Flexible paid time off

Medical, dental, vision insurance

Equity

Job summary

Sierra, headquartered in San Francisco with expanding offices across North America, Europe and Asia, is building a platform to deliver human-centered AI experiences. You’ll work on the Agent SDK, enabling agents to reason, take actions, and interact with users and systems.

We value trust, customer obsession, craftsmanship, intensity, and family, and offer flexible PTO, comprehensive health benefits, and equity.

Qualifications

• Experience building production software and systems.
• Ability to design scalable AI-powered systems.
• Self‑driven with strong ownership and accountability.

Responsibilities

• Build core systems powering agents and the Agent SDK.
• Design the agentic loop for steerable, verifiable agents.
• Improve retrieval and grounding for trustworthy responses.
• Build evaluation frameworks to measure agent quality.

Skills

AI product passion

Strong software engineering

High autonomy

4+ years production experience

Education

Degree in Computer Science or related field

Tools

Go

Typescript

Job description

Sierra, headquartered in San Francisco with expanding offices across North America, Europe and Asia, is building a platform to deliver human-centered AI experiences. You’ll work on the Agent SDK, enabling agents to reason, take actions, and interact with users and systems.

We value trust, customer obsession, craftsmanship, intensity, and family, and offer flexible PTO, comprehensive health benefits, and equity.