Applied AI Engineer, Prototyping at Mistral (Paris, France)
Mistral· Paris, France·
Role details
Healthcare Coverage · Parental Leave · Retirement Plans · Relocation Support · Wellness Programs · Meal Allowances · Transportation Allowances
Mistral at a glance
A French AI lab building open and frontier-grade large language models, with the full developer and enterprise stack around them.
Mistral is a French AI lab that builds open and frontier-grade large language models and sells the full stack around them: developer tooling, an agent studio, consumer and enterprise apps like Le Chat and Vibe, custom model training, and its own GPU compute. Its edge is deployment control, with open weights, EU hosting, and self-hosting for regulated and sovereign buyers.
$3B+ raised · latest: Series C · 1.7B euros · Sept 2025 · backed by ASML, Nvidia, Andreessen Horowitz, DST Global
Summary
Build and deliver production-grade full-stack AI solutions for global customers and internal teams. The role involves translating business problems into working software, owning architecture, and collaborating across GTM, product, and engineering to ship high-impact AI systems.
Job description
About Mistral
Mistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector, co-creating customized AI systems that they can run on their terms. 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 Europe, North America, Asia and the Middle East. We are creative, low-ego and team-spirited.
The Role
As an Applied AI Engineer on the Proto team, you will lead the design and delivery of robust, production-grade AI systems in rapid development cycles. The Proto team sits at the intersection of product and customer, turning advanced technology into meaningful, real-world solutions. You will be deeply involved in both client-facing and internal projects, ensuring Mistral’s capabilities directly address business needs and drive measurable value. You will translate complex, often ambiguous business requirements into engineered solutions that work at scale. In this role, you guide technical decisions, collaborate closely with internal teams and customers, and help shape product direction by pressure-testing what’s possible. Your work will unlock new business opportunities and help drive continuous product improvement.
What You Will Do
- Deliver end-to-end full-stack AI solutions from project scoping through deployment
- Partner with customers to clarify needs, define requirements, and architect robust systems
- Ship ready-to-use applications for both clients and Mistral’s internal teams
- Lead architecture and technical choices, ensuring solutions are scalable and reliable
- Diagnose and solve complex technical problems across various industries and use cases
- Contribute to internal tools, product improvements, and open-source initiatives
- Evaluate and integrate new technology capabilities into existing systems
What We're Looking For
- At least 2 years building and deploying production AI products or systems
- Strong experience with vibe coding tool, with high regards for clean code & high architecture standards
- Experience working with modern GenAI stacks with expertise in RAG, Agent, Evaluation & Orchestration.
- Strong Python skills, with experience in scalable backend frameworks like FastAPI
- Familiarity with frontend development, ideally using frameworks such as React or Vue
- Ability to quickly understand business needs and translate them into technical plans
- Skilled at explaining complex technical ideas to diverse stakeholders
- Track record of collaborating effectively across different teams
What We Offer
We offer a comprehensive benefits package designed to support your well-being, growth, and work-life balance. Benefits vary by country and may include healthcare coverage, parental leave, retirement plans, relocation support, wellness programs, meal and transportation allowances, and other location-specific perks. For the most up-to-date details on benefits available in your location, please refer to our Benefits page.
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Why work at Mistral
- Culture: Flat structure, high ownership, low ego, and a "builders, not order takers" mentality. The company values audacity, speed, rigor, and customer centricity.
- Remote/Hybrid/Office: Based in Paris (15 rue des Halles); relocation support and visa sponsorship offered. Specific remote/hybrid policy not detailed, but global team suggests flexibility.
- Notable perks and benefits (from careers page):
- 20 weeks paid parental leave for all birthing parents.
- 100% employer-sponsored medical, dental, and vision coverage for employees and dependents.
- 6% 401k match (US) / 5% pension contribution (UK).
- Childcare support (reserved daycare seats or financial assistance).
- Meal allowances and transportation support.
- Fitness and wellness subsidies.
- Relocation and settling-in services.
- Financial and career planning support.
- Team composition: 900+ employees from 30+ nationalities; 50% female leaders.
- Interview process: For science, product, and engineering roles: intro conversation → 2-5 technical exercises → 1-3 interviews (hiring manager + teammates) → values conversation → reference checks.