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AI Agent Runtime Engineer

Job in San Francisco, San Francisco County, California, 94199, USA
Listing for: Sierra
Full Time position
Listed on 2026-09-09
Job specializations:
  • Software Development
    AI Engineer (Applied/Software)
Salary/Wage Range or Industry Benchmark: 140000 - 190000 USD Yearly USD 140000.00 190000.00 YEAR
Job Description & How to Apply Below

Sierra in San Francisco is building a platform to enable every company in the world to build better, more human customer experiences with AI. You will work on the Agent SDK — the orchestration engine, runtime, and primitives that define how agents reason, take actions, and interact with users and systems.

You’ll design steerable, verifiable primitives, improve retrieval and grounding for trustworthy responses, and build evaluation frameworks to measure and improve agent quality over time.

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