# Applied AI, Use-case, Software Engineer (Harness)

**Company**: Mistral AI
**Location**: Paris, FR
**Work arrangement**: hybrid
**Experience**: mid
**Job type**: full-time
**Category**: Engineering
**Industry**: Technology
**Wikidata**: https://www.wikidata.org/wiki/Q119718658

**Apply**: https://jobs.lever.co/mistral/49aa2bb7-5504-46d3-bc40-e1bcdb12cee2?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_99a84f3b-35f

## Description

We are seeking strong Software Engineers with cybersecurity experience to build and productionize our cybersecurity product offering. You will turn cutting-edge prototypes into robust, scalable services that power both our offensive and defensive security capabilities.

Cyber Harness Productionization

- Build and productionize the cyber harness and service prototype, turning research into deployable solutions

- Orchestrate red-team / blue-team agent loops: find vuln → patch → redeploy → re-test

- Develop the context engineering that enables autonomous security workflows

- Create connectors, worker scaling mechanisms, SDKs, and packaging that make demos into services

Mistral Stack Integration

- Build on Mistral's corporate stack: Workflows (temporal-style orchestrator) and Vibe

- Work with containers/Kubernetes to deploy and scale cyber capabilities

- Leverage Mistral Models to power agentic security workflows

- Migrate existing prototypes onto our production infrastructure

Service Engineering

- Design and implement the engineering foundation that enables Applied to deploy at clients

- Create the infrastructure Science can train against for continuous improvement

- Ensure the cyber harness is robust, scalable, and maintainable

- Collaborate with security and engineering teams to integrate cyber capabilities

About you

- Strong software engineer with hands-on experience building cybersecurity products or tooling

- Comfortable with agentic / LLM orchestration and context engineering

- Builder mindset with a track record of shipping production-quality code

- Experience with distributed systems and service architecture

- Strong problem-solving abilities and attention to detail

- Excellent communication skills and collaborative attitude

It would be ideal if you also have:

- Red-teaming, offensive-tooling, or harness-building background

- Experience with orchestration internals (Temporal, Workflows, or similar)

- Prior experience building a 'harness for X/Y use case in cybersecurity' or similar agent system

- Infrastructure knowledge: containers & Kubernetes to move fast

- Experience with AI/ML systems in security contexts

- Contributions to open-source security or orchestration tools

## Skills

### Required
- cybersecurity
- software engineering
- agentic/LLM orchestration
- context engineering
- distributed systems
- service architecture
- problem-solving
- communication
- collaboration

### Nice to have
- red-teaming
- offensive-tooling
- harness-building
- orchestration internals
- Temporal
- Workflows
- containers
- Kubernetes
- AI/ML systems
- open-source security

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Source: [Apply at jobs.lever.co](https://jobs.lever.co/mistral/49aa2bb7-5504-46d3-bc40-e1bcdb12cee2?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)