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# Software Engineer, Agent Harness Organization

- **Company:** SIM PARTNERS, INC.
- **Location:** San Francisco, CA, United States
- **Salary:** $210,000.0 - $260,000.0
- **Contract:** Permanent contract
- **Skills:** Software Engineering, Large Language Models
- **Published:** August 31, 2026
- **Apply:** https://www.careerbuilder.com/job-details/software-engineer-agent-harness-san-francisco-ca--cbf91fc7-1148-4103-a386-01c4c1081fe7

## About the Role

Diversity, Knowledge Base, Memory Hardware, Software Engineering

## Description

Our mission is to automate knowledge work. The first step in our journey is to build the best tool for teams to build agents.

Sim is talent-dense. We're looking for special people who are mission-driven, passionate, and creative.

About the Role

The agent harness is Sim. It's the agent that builds workflows, tables, creates knowledge bases, and does everyday tasks. As a member of this team, you'll build the agent that builds everything else: how it plans, calls tools, uses memory, recovers from failure, and runs reliably at scale for 100,000+ builders.

You may be a fit if

 * You can think clearly about LLM behavior (tool calls, context, retries, evals) and you can turn that intuition into robust infrastructure.


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- [The Avengers Initiative (Practical Ethics for Software Engineers)](https://www.wearedevelopers.com/videos/2070-the-avengers-initiative-practical-ethics-for-software-engineers)
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