Clera

Founding Harness Engineer

San Francisco

Get past the screening software and onto a recruiter's desk

hirly rewrites your resume for this job — matching the keywords and skills in the posting, moving your most relevant experience to the top, and writing a cover letter to fit. About 30 seconds.

Keywords matched to this posting
Fit score before you apply
Cover letter included

Matched against 2.6M live jobs from 210,000+ employers in 200+ countries.

Tailor my resume for this job →

Apply from your AI assistant

Connect hirly to Claude or ChatGPT and ask it to apply to this job. hirly tailors your resume, fills the employer’s form and asks before sending.

See how it works

Some employer sites stop an application at a CAPTCHA or sign-in and hand it back with a link. Applying needs a paid plan. Works with any assistant that supports MCP.

hirly's read of this role

Seniority: Mid level
Stated salary: $200,000 per year
Country: US
Work mode: On-site / unstated
First seen by hirly: 7 Nov 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

About the Role

Join an early-stage AI company building an AI coworker for teams. You will develop the runtime and safeguards that help AI agents take useful initiative, work reliably, and handle real tasks safely.

What You'll Do

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.

Work directly with the founding team and early users to shape the product.

What We're Looking For

Production experience shipping tool-using LLM agents, beyond demos or thin prompt wrappers.

Hands-on system prompt design, with iterative testing and improvement.

Experience building evaluation and regression test harnesses for LLM or agent behavior.

Understanding of safe tool execution, approval workflows, and multi-user data risks.

Strong ownership across prototyping and production, with the ability to explain technical tradeoffs.

Experience with LLM agents, tool use, evaluation, and prompt engineering.

Compensation & Benefits

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

Location

On-site in San Francisco, United States. Candidates should be based in the Bay Area or willing to relocate.

Original posting on Clera's site ↗

Listed on hirly, a job board. hirly is not the employer: Clera is hiring for this role.

Browse similar roles

Want this one?

Upload your resume and hirly rewrites it for this job and writes the cover letter — in about thirty seconds, before you sign up.

Tailor my resume for this job