Data Annotation Quality Specialist at Mistral (Paris, France)
Mistral· Paris, France·
Role details
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
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 a Data Quality Specialist on the Human Data Annotation team, you will ensure the highest standards of quality and efficiency in human data annotations. This role exists to support the development and evaluation of AI models by creating and auditing annotations that meet rigorous guidelines. You will work closely with the technical team to refine annotation processes, tools, and guidelines, directly contributing to the accuracy and reliability of our models. Your attention to detail and analytical skills will help maintain the integrity of the data that powers Mistral’s AI systems.
What You Will Do
- Create high-quality data annotations based on guidelines and continuous feedback.
- Review and audit annotations to clarify requirements and improve annotation processes.
- Collaborate with the technical team to share insights that enhance tools and guidelines.
- Apply strong research and analytical skills to ensure data accuracy and consistency.
- Exercise sound judgment when working with complex instructions, limited data, or multiple information sources.
- Adapt to dynamic environments and evolving requirements to maintain high standards.
- Contribute to operational workflows with a high tolerance for repetitive tasks.
What We're Looking For
- Relevant academic background in science, technology, engineering, or mathematics.
- Professional proficiency in English, with strong writing and comprehension skills.
- Outstanding research and analytical abilities to ensure data quality.
- Excellent communication, interpersonal, and organizational skills.
- Ability to adapt easily to changing requirements and dynamic environments.
- Willingness to engage in operational work and learn new tools and technologies.
- Experience with data, fluency in multiple languages, or familiarity with code is a plus.
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.
Privacy Policy Your privacy matters to us. You can learn more about how we handle your personal data in our Applicant Privacy Policy.
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.