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

> 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: - Build and productionize the cyber harnes

- **Company:** Mistral AI (https://jobs.trythestack.co/companies/mistral-ai)
- **Location:** London, 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, SDK Development, Temporal, Python, Software Engineering, API Design, Agentic Workflows, Productionization
- **Posted by employer:** 2026-05-28
- **Added to The Stack:** 2026-06-11
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.lever.co/mistral/49aa2bb7-5504-46d3-bc40-e1bcdb12cee2 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/applied-ai-use-case-software-engineer-harness-mistral-ai

## About the role

Responsibilities:
- Build and productionize the cyber harness and service prototype, turning research prototypes into scalable, maintainable client-facing services.
- Orchestrate red-team / blue-team agent loops (discover → patch → redeploy → retest) and implement context engineering for autonomous workflows.
- Create connectors, worker-scaling systems, SDKs and packaging to convert demos into deployable services on container platforms.
- Integrate with Mistral's stack (workflow/temporal-style orchestrator, Vibe) and enable Science to train and evaluate against the infrastructure.
- Ensure robustness, observability, operational readiness and collaborate with security, applied and platform teams during deployments.

Requirements:
- Strong software engineering background with experience shipping production-grade, distributed services and scalable architectures.
- Hands-on experience with Kubernetes/containers, orchestration frameworks, SDK development, and operational tooling (Python or similar).
- Familiarity with agentic/LLM orchestration, context engineering and offensive/defensive security tooling and workflows.
- Track record of delivering testable, maintainable code, and ability to collaborate closely with research and security teams to productionize prototypes.

## Responsibilities

Build and productionize a cybersecurity harness by turning research prototypes into scalable, robust 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 2026-05-28. Listings more than 30 days old may no longer be active, so check Mistral AI's site before applying.
- **Does Mistral AI offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Mistral AI's site.
- **Where is this role located?** The listing gives the location as London, 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, SDK Development, Temporal, Python, Software Engineering, API Design, Agentic Workflows, Productionization.

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