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1–2 jobs· newest first

Founding Harness Engineer
Clera · Remote, Serbia+2 more
Remote
Founding Harness Engineer
Clera · San Francisco, US
$0–$200KOn-site · Full-time

+10K new in the last hour

Founding Harness Engineer

Clera · Posted Nov 6, 2026

Remote, Serbia +2 more
Remote

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Build the agent runtime and evaluation systems for AI coworkers in team workflows.

Locations (3)

Serbia
Poland
Eastern Europe

Compensation

Founding equity is offered; the percentage and vesting terms are to be confirmed.

Responsibilities

Design and build the agent runtime for providing context, selecting tools, requesting approvals, and completing work.
Write and refine system prompts to make agent behavior proactive without becoming noisy or unsafe.
Build evaluation and regression tests for real tasks, tool use, and failure cases.
Improve reliability across long-running tasks, interruptions, and retries.
Implement safeguards such as approval gates and multi-tenant data separation.

Skills

Production experience shipping tool-using LLM agents Hands-on system prompt design Building evaluation and regression test harnesses Safe tool execution Approval workflows Multi-user data risks LLM agents Tool use Evaluations Prompt engineering

Benefits

Founding equity

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Founding Harness Engineer

Clera · Posted Nov 6, 2026

San Francisco, California, United States
On-site
Full-time
$0–$200K per year

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Develop the runtime and safeguards that help AI agents take useful initiative, work reliably, and handle real tasks safely.

Compensation

Salary range: $0 to $200,000 USD annually. Founding equity is available; percentage and vesting details are to be determined.

Responsibilities

Design and build the agent runtime for context gathering, deciding when to act, tool selection, approval, and task completion.
Write and refine system prompts to encourage useful initiative without noisy or risky behavior.
Build evaluation and regression tests for real tasks, tool use, and failure cases, and catch regressions as prompts change.
Improve reliability across long-running work, interruptions, and retries.
Implement safety boundaries, including approval gates and multi-tenant data separation.

Skills

Production experience shipping tool-using LLM agents system prompt design evaluation and regression test harnesses safe tool execution approval workflows

prompt engineering

See full job description