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

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Productionize the cyber harness: convert

- **Company:** Mistral (https://jobs.trythestack.co/companies/mistral)
- **Location:** France
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Cybersecurity Product Development, LLM Orchestration, Distributed Systems, Service Architecture, Context Engineering, Kubernetes, Containers, Red-teaming, Offensive Tooling, Software Engineering, SDK Development, API Connectors, Temporal, Agentic Workflows, Productionization, Problem Solving
- **Posted by employer:** 2026-06-10
- **Added to The Stack:** 2026-07-10
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/mistral.ai/28f234a0-7c9f-4142-823c-387896db5e8b (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/applied-ai-use-case-software-engineer-harness-mistral

## About the role

Responsibilities:
- Productionize the cyber harness: convert research prototypes into robust, scalable services for offensive and defensive security use-cases.
- Orchestrate red-team/blue-team agent loops (find vuln → patch → redeploy → retest) and automate lifecycle workflows.
- Build context engineering, connectors, worker scaling, SDKs, packaging and deployment patterns to make demos production-ready.
- Integrate harnesses with Mistral’s stack: temporal-style workflows, Vibe, container/Kubernetes deployments and model services.
- Collaborate with Applied, Science and Product teams to align requirements, run client deployments, and support training against the harness.
- Design for reliability, observability, testing and security from prototype to production.

Requirements:
- 5+ years software engineering experience, preferably with cybersecurity product development or offensive/defensive tooling.
- Proven ability to ship production-quality code, build APIs/SDKs, and design scalable distributed systems.
- Experience with LLM orchestration, agentic workflows, context engineering and evaluation frameworks.
- Strong skills with containers, Kubernetes, workflow engines (e.g., Temporal), and deployment automation.
- Proficiency in Python/Go/TypeScript and solid testing, debugging and CI/CD practices.
- Excellent collaboration and communication skills; comfortable working across research, applied and product teams.

## Responsibilities

Build and productionize a cybersecurity harness to transform research prototypes into scalable, production-grade services. Orchestrate red-team and blue-team agent loops and integrate these capabilities into Mistral's corporate stack.

## Requirements

Requires a strong software engineer with hands-on experience in cybersecurity tooling and distributed systems. Proficiency in agentic LLM orchestration and a track record of shipping production-quality code are essential.

## FAQ

- **Is this Applied AI, Use-case, Software Engineer (Harness) role still open?** It was posted on 2026-06-10. Listings more than 30 days old may no longer be active, so check Mistral's site before applying.
- **Does Mistral offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Mistral's site.
- **Where is this role located?** The listing gives the location as France. It is marked on-site.
- **What skills does this role ask for?** The listing names: Cybersecurity Product Development, LLM Orchestration, Distributed Systems, Service Architecture, Context Engineering, Kubernetes, Containers, Red-teaming, Offensive Tooling, Software Engineering, SDK Development, API Connectors, Temporal, Agentic Workflows, Productionization, Problem Solving.

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## Notes for agents

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