At a Glance
- Tasks: Build and productionize cutting-edge AI-powered cybersecurity solutions.
- Company: Join Mistral AI, a pioneering tech company transforming the future of AI.
- Benefits: Enjoy competitive salary, health insurance, and generous parental leave.
- Other info: Opportunities for career growth in a collaborative, innovative environment.
- Why this job: Make a real impact in AI and cybersecurity while collaborating with a dynamic team.
- Qualifications: Strong software engineering skills with cybersecurity experience required.
The predicted salary is between 60000 - 80000 £ per year.
About Mistral
At Mistral AI, we believe in the power of AI to simplify tasks, save time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life. We democratize AI through high-performance, optimized, open-source and cutting‑edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise needs, whether on‑premises or in cloud environments. Our offerings include Vibe, the AI assistant for life and work. We are a dynamic, collaborative team passionate about AI and its potential to transform society. Our diverse workforce thrives in competitive environments and is committed to driving innovation. Our teams are distributed between France, USA, UK, Germany and Singapore. We are creative, low‑ego and team‑spirited. Join us to be part of a pioneering company shaping the future of AI. Together, we can make a meaningful impact.
Role summary
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. Your work will directly enable Applied to deploy at client sites while giving Science the infrastructure to train against. You'll orchestrate red‑team/blue‑team agent loops, build on Mistral's corporate stack, and create the connectors, worker scaling, and SDKs that transform demos into production‑grade services. This is a unique opportunity to shape how AI‑powered cybersecurity operates at scale.
What you will do
- 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
Location & Remote
This role is primarily based at one of our European offices (Paris, France and London, UK). We will prioritize candidates who either reside there or are open to relocating. We strongly believe in the value of in‑person collaboration to foster strong relationships and seamless communication within our team. In certain specific situations, we will also consider remote candidates based in one of the countries listed in this job posting — currently France & UK. In that case, we ask all new hires to visit our local office for the first week of their onboarding (accommodation and travelling covered) then at least 3 days per month.
What we offer
- Competitive salary and equity
- Health insurance
- Transportation allowance
- Sport allowance
- Meal vouchers
- Private pension plan
- Generous parental leave policy
- Visa sponsorship
Applied AI, Use-case, Software Engineer (Harness) employer: Mistral AI
At Mistral AI, we are committed to fostering a dynamic and collaborative work environment where innovation thrives. Our employees benefit from competitive salaries, generous parental leave, and comprehensive health insurance, alongside unique opportunities for professional growth in the rapidly evolving field of AI and cybersecurity. With offices in vibrant locations like Paris and London, we prioritise in-person collaboration to strengthen team relationships, making Mistral an excellent employer for those looking to make a meaningful impact in technology.
StudySmarter Expert Advice🤫
We think this is how you could land Applied AI, Use-case, Software Engineer (Harness)
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Mistral AI or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Mistral AI.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Mistral AI.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Mistral AI that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Applied AI, Use-case, Software Engineer (Harness)
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Mistral AI.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Mistral AI and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Mistral AI
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Mistral AI uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
