Software Engineer, QA

Paris / Berlin/Munich/Frankfurt / London / Barcelona/Madrid
Engineering & Infra /
Full-time /
Hybrid
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 le Chat, 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. See more about our culture on https://mistral.ai/careers.


What you will do

Model Behavior Testing: Develop and execute tests to validate the behavior of machine learning models, ensuring they produce consistent, accurate, and contextually appropriate outputs.
API Testing Automation: Build automated testing suites to ensure APIs function correctly and integrate seamlessly with the inference stack, preventing critical errors during deployment.
Edge Case Analysis: Collaborate with PMs and other stakeholders to identify and rigorously test edge cases, improving the robustness of both models and platform features.
• Release Readiness Validation: Implement pre-release quality gates to validate models, APIs, and platform updates, providing a green light for production releases.
Systematic QA Campaigns: Design and lead comprehensive quality assurance campaigns, including functional, stress, and performance testing, to proactively identify potential issues.
• Quality Platform Development: Contribute to building tools and frameworks that enable more efficient and scalable quality testing processes across the organization.

About you

• You have a proven ability to create and execute comprehensive test strategies, covering functional, regression, and exploratory testing.
• You are proficient in QA tools like Postman, Selenium, or similar platforms for API and functional testing.
• You’re skilled in identifying, documenting, and collaborating with developers to resolve issues efficiently.
• You are autonomous and a self-starter.
• You are a proactive problem-solver with a continuous improvement mindset.

Now it would be ideal if you have :

• Experience testing Machine Learning models.
• Understanding of the Machine Learning lifecycle.
• Proficiency in Python or similar languages.
• Hands-on API testing experience.
• Strong debugging skills.

Hiring Process

- Recruiter Screening (45min)
- Hiring Manager Interview (30min)
- Take-home test
- Live-Coding (Scripting) (60min)
- Culture-fit discussion (30min)
Location & Remote

This role is primarily based at our HQ in Paris, France. We will prioritize candidates who either reside in Paris 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. Our remote work policy is designed to offer flexibility, enhance work-life balance, and boost productivity. The number of remote workdays is determined by each manager, taking into account individual autonomy and specific circumstances—such as increased flexibility during the summer months. Regardless of the arrangement, we expect all employees to maintain open lines of communication with their teams and be available during core working hours.

In certain specific situations, we will also consider remote candidates based in one of the countries listed in this job posting (currently France 🇫🇷 UK 🇬🇧 Germany 🇩🇪 and Spain 🇪🇸). In that case, we ask all new hires to visit our Paris office:
•  for the first month of their onboarding (accommodation and travelling covered)
•  then at least 3 days per month

Note: we cover 100% of inter-country travelling and 50% of intra-country travel fees


What we offer

💰 Competitive cash salary and equity
🧑‍⚕️ Health insurance
🚴 Transportation allowance
🥎 Sport allowance
🥕 Meal vouchers
💰 Private pension plan
🍼 Parental : Generous parental leave policy
🌎 Visa sponsorship