Skip to content
CV Rocket
Get me interviews
How it worksThe enginePricingBlogContactSign in

Open nowPosted 2 hours agoWe saw it 42 min after it went up

AI Harness Engineer

Jobgether4,227 open roles

Where
France
Work mode
Remote
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowAI Harness EngineerJobgether · France

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on Jobgether's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

7.4% of postings close within 7 days. Measured by our own scanner across the market. Jobgether postings stay open a median of 2 days.

Share of postings closed within
  1. 1.5%1 day
  2. 3.5%3 days
  3. 7.4%7 days
  4. 13.2%14 days
  5. 34.5%30 days
This job: posted 2 hours ago

Jobgether median: 2 days open

The posting

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for an AI Harness Engineer based in France.

As an AI Harness Engineer, you will build the systems and integrations that connect people with powerful local AI capabilities. You’ll work at the intersection of AI tooling, agent infrastructure, and peer-to-peer technology, helping create scalable experiences for the next generation of AI assistants. Your work will include developing reusable tools and modules, supporting diverse AI model types and sizes, and building reliable systems for non-deterministic environments. You’ll contribute to the evolution of P2P technology designed to enable local AI at scale. The role combines deep software engineering with experimentation and rapid technical exploration. You’ll join a remote, globally distributed environment where autonomy, technical curiosity, and continuous innovation are highly valued.

Accountabilities

  • Build and deliver new features and bug fixes with a strong focus on reliability, performance, and user satisfaction.
  • Design and develop reusable tools, modules, and integrations that enable new AI capabilities across different model types and sizes.
  • Build and maintain AI agent harnesses, including tool calling, agent loops, context management, and structured outputs.
  • Develop evaluation frameworks and testing infrastructure for AI systems with non-deterministic behavior.
  • Implement and evolve peer-to-peer technology to support local AI and distributed use cases.
  • Maintain a high-quality codebase through consistent coding standards, code reviews, modular architecture, and automated testing.
  • Design systems that can reliably handle failures such as network partitions, model errors, timeouts, and retries.
  • Develop and maintain reusable npm modules and shared software components.
  • Experiment with new technologies and approaches to continuously expand AI and P2P capabilities.
  • Collaborate effectively with a globally distributed engineering team while communicating technical ideas clearly.
  • 5+ years of experience building and maintaining production software.
  • Strong proficiency in JavaScript and TypeScript, including experience modeling complex state across synchronization protocols, agent loops, or similar systems.
  • Strong ability to write modular, maintainable, and reusable code.
  • Hands-on experience building AI agent harnesses, including tool calling, context management, agent loops, and structured outputs.
  • Experience developing evaluation systems and test infrastructure for non-deterministic AI or other complex systems.
  • Experience creating and managing reusable npm modules.
  • Strong testing and debugging skills, with a focus on reliability and production quality.
  • Strong understanding of and practical experience developing and using AI tools.
  • Deep interest or professional experience with peer-to-peer technologies, networking, or distributed systems.
  • Experience designing resilient systems that account for network failures, model errors, timeouts, retries, and other failure scenarios.
  • Contributions to open-source projects related to P2P, networking, AI tooling, or adjacent technologies are valued.
  • Strong communication skills and the ability to work effectively in a remote, globally distributed environment.
  • A highly experimental, hands-on mindset with a willingness to continuously test ideas, explore emerging technologies, and solve challenging technical problems.
  • Fully remote work environment.
  • Opportunity to work on emerging AI, agent infrastructure, and peer-to-peer technologies.
  • Exposure to complex distributed systems and non-deterministic AI applications.
  • Opportunity to contribute to open-source P2P, networking, and AI tooling ecosystems.
  • International and globally distributed engineering environment.
  • High degree of autonomy and room for experimentation and technical innovation.

How Jobgether works:

We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.

We appreciate your interest and wish you the best!

Why Apply Through Jobgether?

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.

#LI-CL1

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against Jobgether's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on Jobgether's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    Jobgether's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.